Update build script to use subprocess instead of system.cmd

[dabico]

Not ready to merge, Linux build is currently failing:

[+] Building 17.3s (9/10)                                                                                                                                                                                                                                                                     docker:desktop-linux
 => [internal] load .dockerignore                                                                                                                                                                                                                                                                             0.0s
 => => transferring context: 272B                                                                                                                                                                                                                                                                             0.0s
 => [internal] load build definition from Dockerfile                                                                                                                                                                                                                                                          0.0s
 => => transferring dockerfile: 655B                                                                                                                                                                                                                                                                          0.0s
 => [internal] load metadata for docker.io/library/alpine:3.19.0                                                                                                                                                                                                                                              0.0s
 => CACHED [build 1/5] FROM docker.io/library/alpine:3.19.0                                                                                                                                                                                                                                                   0.0s
 => [internal] load build context                                                                                                                                                                                                                                                                             2.4s
 => => transferring context: 1.50MB                                                                                                                                                                                                                                                                           2.4s
 => [build 2/5] RUN apk update --quiet && apk add --quiet --no-cache alpine-sdk make openjdk11 python3 py3-distutils-extra                                                                                                                                                                                   12.2s
 => [build 3/5] WORKDIR /java-tree-sitter                                                                                                                                                                                                                                                                     0.0s
 => [build 4/5] COPY . ./                                                                                                                                                                                                                                                                                     4.6s
 => ERROR [build 5/5] RUN python3 build.py --verbose                                                                                                                                                                                                                                                          0.3s
------                                                                                                                                                                                                                                                                                                             
 > [build 5/5] RUN python3 build.py --verbose:                                                                                                                                                                                                                                                                     
0.265 /java-tree-sitter/build.py:5: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
0.265   from distutils.ccompiler import new_compiler as new_c_compiler
0.274 make: Entering directory '/java-tree-sitter/tree-sitter'
0.277 rm -f lib/src/*.o libtree-sitter.a libtree-sitter.so libtree-sitter.so.0 libtree-sitter.so.0.0
0.278 make: Leaving directory '/java-tree-sitter/tree-sitter'
0.279 make: Entering directory '/java-tree-sitter/tree-sitter'
0.282 cc -O3 -Wall -Wextra -Werror -std=gnu99 -fPIC -Ilib/src -Ilib/include   -c -o lib/src/alloc.o lib/src/alloc.c
0.291 cc: fatal error: cannot execute 'cc1': execvp: No such file or directory
0.291 compilation terminated.
0.292 make: *** [<builtin>: lib/src/alloc.o] Error 1
0.292 make: Leaving directory '/java-tree-sitter/tree-sitter'
0.292 Traceback (most recent call last):
0.292   File "/java-tree-sitter/build.py", line 174, in <module>
0.293     build(args.repositories, args.output, args.system, args.arch, args.verbose)
0.293   File "/java-tree-sitter/build.py", line 51, in build
0.293     raise RuntimeError("Failed to build tree-sitter library.")
0.293 RuntimeError: Failed to build tree-sitter library.
------
Dockerfile:20
--------------------
  18 |     COPY . ./
  19 |     
  20 | >>> RUN python3 build.py --verbose
  21 |     
  22 |     FROM scratch AS export
--------------------
ERROR: failed to solve: process "/bin/sh -c python3 build.py --verbose" did not complete successfully: exit code: 1