fix codebuild to add setup_net for install_mpl_test_vector_runner.sh

Author: imabhichow

codebuild/py311/decrypt_dafny_esdk_vectors_keyrings.yml

@@ -20,6 +20,7 @@ phases:
   install:
     runtime-versions:
       python: 3.11
+      dotnet: 6.0
   pre_build:
     commands:
       # Build Python MPL TestVector runner from source      

codebuild/py311/decrypt_golden_manifest_with_keyrings.yml

@@ -16,6 +16,7 @@ phases:
   install:
     runtime-versions:
       python: 3.11
+      dotnet: 6.0
   pre_build:
     commands:
       # Build Python MPL TestVector runner from source      

codebuild/py311/decrypt_keyrings_with_keyrings.yml

@@ -16,6 +16,7 @@ phases:
   install:
     runtime-versions:
       python: 3.11
+      dotnet: 6.0
   pre_build:
     commands:
       # Build Python MPL TestVector runner from source      

codebuild/py311/decrypt_masterkey_with_keyrings.yml

@@ -16,6 +16,7 @@ phases:
   install:
     runtime-versions:
       python: 3.11
+      dotnet: 6.0
   pre_build:
     commands:
       # Build Python MPL TestVector runner from source      

codebuild/py311/decrypt_net_401_vectors_keyrings.yml

@@ -17,6 +17,7 @@ phases:
   install:
     runtime-versions:
       python: 3.11
+      dotnet: 6.0
   pre_build:
     commands:
       # Build Python MPL TestVector runner from source      

codebuild/py311/encrypt_keyrings.yml

@@ -16,6 +16,7 @@ phases:
   install:
     runtime-versions:
       python: 3.11
+      dotnet: 6.0
   build:
     commands:
       # Build Python MPL TestVector runner from source      

codebuild/py311/generate_decrypt_vectors_keyrings.yml

@@ -16,6 +16,7 @@ phases:
   install:
     runtime-versions:
       python: 3.11
+      dotnet: 6.0
   build:
     commands:
       # Build Python MPL TestVector runner from source      

codebuild/py312/decrypt_dafny_esdk_vectors_keyrings.yml

@@ -20,6 +20,7 @@ phases:
   install:
     runtime-versions:
       python: 3.12
+      dotnet: 6.0
   pre_build:
     commands:
       # Build Python MPL TestVector runner from source      

codebuild/py312/decrypt_golden_manifest_with_keyrings.yml

@@ -16,6 +16,7 @@ phases:
   install:
     runtime-versions:
       python: 3.12
+      dotnet: 6.0
   pre_build:
     commands:
       # Build Python MPL TestVector runner from source      

codebuild/py312/decrypt_hkeyring_with_keyrings.yml

@@ -16,6 +16,7 @@ phases:
   install:
     runtime-versions:
       python: 3.12
+      dotnet: 6.0
   pre_build:
     commands:
       # Build Python MPL TestVector runner from source