[skip-changelog] fix: CI should not rely on external resources / CI CodeCov upload workaround (#3036)

* fix: CI should not rely on external resources

> Retrokits-RK002:arm@1.0.6 0 B / ?    0.00%
> Retrokits-RK002:arm@1.0.6 Server responded with: 403 Forbidden
> Error during install: Server responded with: 403 Forbidden
> ESC[90m<<< Run completed (err = exit status 1)ESC[0m
>     core_test.go:832:
>            Error Trace:    /home/runner/work/arduino-cli/arduino-cli/internal/integrationtest/core/core_test.go:832
>            Error:          Received unexpected error:
>                            exit status 1
>            Test:           TestCoreListSortedResults
> --- FAIL: TestCoreListSortedResults (3.76s)

* Workaround for codevcov uploader bug

There is a bug in the codecov uploader that makes it fail when there are broken symlinks in the repository.
We must keep this workaround until the bug is fixed: codecov/codecov-action#1890

Author: cmaglie

.github/workflows/test-go-task.yml

@@ -204,6 +204,13 @@ jobs:
           fi
           echo "CODECOV_TOKEN=$CODECOV_TOKEN" >> "$GITHUB_ENV"
 
+      # There is a bug in the codecov uploader that makes it fail when there are broken symlinks in the repository.
+      # We must keep this workaround until the bug is fixed: https://github.com/codecov/codecov-action/issues/1890
+      - name: Workaround for codecov uploader bug
+        run: |
+          rm internal/integrationtest/compile_4/testdata/ValidSketchWithNonInoBrokenSketchFileSymlink/other_file.c
+          touch internal/integrationtest/compile_4/testdata/ValidSketchWithNonInoBrokenSketchFileSymlink/other_file.c
+
       - name: Send unit tests coverage to Codecov
         uses: codecov/codecov-action@v5
         with:

internal/integrationtest/core/core_test.go

@@ -828,7 +828,7 @@ func TestCoreListSortedResults(t *testing.T) {
 	require.NoError(t, err)
 
 	// install some core for testing
-	_, _, err = cli.Run("core", "install", "test:x86@2.0.0", "Retrokits-RK002:arm", "Package:x86", "--additional-urls="+url.String())
+	_, _, err = cli.Run("core", "install", "test:x86@2.0.0", "arduino:samd", "Package:x86", "--additional-urls="+url.String())
 	require.NoError(t, err)
 
 	// list all with additional url specified