[skip-changelog] test: Fixed runners not running 'board' integration test (#2381)

* test: Fixed runners not running 'board' integration test

* Fixed integration test

* Fixed integration test failure:

<<< Run completed (err = <nil>)
    environment.go:52:
        	Error Trace:	D:/a/arduino-cli/arduino-cli/internal/integrationtest/environment.go:52
            			D:/a/arduino-cli/arduino-cli/internal/integrationtest/environment.go:63
        	            	D:/a/arduino-cli/arduino-cli/internal/integrationtest/environment.go:63
        	            	D:/a/arduino-cli/arduino-cli/internal/integrationtest/environment.go:69
        	            	D:/a/arduino-cli/arduino-cli/internal/integrationtest/board/board_test.go:638
        	Error:      	Received unexpected error:
        	            	remove C:\Users\runneradmin\AppData\Local\Temp\cli2634248494\A\inventory.yaml: The process cannot access the file because it is being used by another process.
        	Test:       	TestCLIStartupWithCorruptedInventory
--- FAIL: TestCLIStartupWithCorruptedInventory (8.45s)

Author: cmaglie

Diff for: .github/workflows/test-go-task.yml

@@ -70,8 +70,9 @@ jobs:
 
       - name: Collect tests
         id: collection
+        # jq flags must be "-cRn" see: https://stackoverflow.com/a/68859958/1655275
         run: |
-          echo "tests-data=$(go list ./internal/integrationtest/... | grep integrationtest/ | tr "/" " " | cut -d " " -f 6 | jq -cR '[inputs]')" >> $GITHUB_OUTPUT
+          echo "tests-data=$(go list ./internal/integrationtest/... | grep integrationtest/ | tr "/" " " | cut -d " " -f 6 | jq -cRn '[inputs]')" >> $GITHUB_OUTPUT
 
   test-integration:
     needs: tests-collector

Diff for: internal/integrationtest/board/board_test.go

@@ -630,6 +630,7 @@ func TestCLIStartupWithCorruptedInventory(t *testing.T) {
 	require.NoError(t, err)
 	_, err = f.WriteString(`data: '[{"name":"WCH;32?'","fqbn":"esp32:esp32:esp32s3camlcd"}]'`)
 	require.NoError(t, err)
+	require.NoError(t, f.Close())
 
 	// the CLI should not be able to load inventory and report it to the logs
 	_, stderr, err := cli.Run("core", "update-index", "-v")

Diff for: internal/integrationtest/board/hardware_loading_test.go

@@ -154,12 +154,7 @@ func TestHardwareLoading(t *testing.T) {
 			out, _, err := cli.Run("core", "list", "--format", "json")
 			require.NoError(t, err)
 			jsonOut := requirejson.Parse(t, out)
-			if runtime.GOOS == "windows" {
-				// a package is a symlink, and windows does not support them
-				jsonOut.LengthMustEqualTo(2)
-			} else {
-				jsonOut.LengthMustEqualTo(3)
-			}
+			jsonOut.LengthMustEqualTo(3)
 			jsonOut.MustContain(`[
 				{
 					"id": "arduino:avr",