CI Updates (#17834)

* Ensure that git access to private repos uses the ELEVATED_GITHUB_TOKEN

* Bump the runner size for the protobuf generation check

This has failed previously when the runner process that communicates with GitHub gets starved causing the job to fail.

.github/workflows/go-tests.yml

@@ -51,7 +51,7 @@ jobs:
   check-generated-protobuf:
     needs: 
     - setup   
-    runs-on: ${{ fromJSON(needs.setup.outputs.compute-small) }}
+    runs-on: ${{ fromJSON(needs.setup.outputs.compute-medium) }}
     steps:
     - uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab # v3.5.2
     # NOTE: This step is specifically needed for ENT. It allows us to access the required private HashiCorp repos.

.github/workflows/test-integrations.yml

@@ -366,6 +366,10 @@ jobs:
       ENVOY_VERSION: "1.25.4"
     steps:
       - uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab # v3.5.2
+      # NOTE: This step is specifically needed for ENT. It allows us to access the required private HashiCorp repos.
+      - name: Setup Git
+        if: ${{ endsWith(github.repository, '-enterprise') }}
+        run: git config --global url."https://${{ secrets.ELEVATED_GITHUB_TOKEN }}:@github.com".insteadOf "https://github.com"
       - uses: actions/setup-go@fac708d6674e30b6ba41289acaab6d4b75aa0753 # v4.0.1
         with:
           go-version-file: 'go.mod'
@@ -477,6 +481,10 @@ jobs:
       ENVOY_VERSION: "1.24.6"
     steps:
       - uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab # v3.5.2
+      # NOTE: This step is specifically needed for ENT. It allows us to access the required private HashiCorp repos.
+      - name: Setup Git
+        if: ${{ endsWith(github.repository, '-enterprise') }}
+        run: git config --global url."https://${{ secrets.ELEVATED_GITHUB_TOKEN }}:@github.com".insteadOf "https://github.com"
       - uses: actions/setup-go@fac708d6674e30b6ba41289acaab6d4b75aa0753 # v4.0.1
         with:
           go-version-file: 'go.mod'