chore: add full license to DEB/RPM packages

Closes #4439.

Author: lidavidm

ci/licenses/README.md

@@ -50,10 +50,11 @@ There is not a separate file for the driver manager, as all of its
 dependencies are vendored, and hence covered by the root LICENSE.txt.
 
 After updating, copy the combined license files to the Python wheel
-directories and commit the result:
+directories and update the Debian copyright file, then commit the result:
 
 ```
 cat LICENSE.txt ci/licenses/flightsql.txt > python/adbc_driver_flightsql/LICENSE.txt
 cat LICENSE.txt ci/licenses/postgresql.txt > python/adbc_driver_postgresql/LICENSE.txt
 cat LICENSE.txt ci/licenses/sqlite.txt > python/adbc_driver_sqlite/LICENSE.txt
+cat LICENSE.txt ci/licenses/flightsql.txt > ci/linux-packages/debian/copyright
 ```

ci/licenses/flightsql.tpl

@@ -1,6 +1,6 @@
 --------------------------------------------------------------------------------
 
-This binary distribution stataically links Go.
+This binary distribution statically links Go.
 The Go project is under the BSD 3-clause license +
 PATENTS weak patent termination clause
 (https://github.com/golang/go/blob/master/PATENTS).

ci/licenses/flightsql.txt

@@ -1,6 +1,6 @@
 --------------------------------------------------------------------------------
 
-This binary distribution stataically links Go.
+This binary distribution statically links Go.
 The Go project is under the BSD 3-clause license +
 PATENTS weak patent termination clause
 (https://github.com/golang/go/blob/master/PATENTS).