GitHub Actions: adjust unit tests for fork PRs #2155

Job	Run time
Start	8s
Build integration tests	38s
Build Piper	2m 34s
Run integration tests ("(TestCNBIntegrationBindings\|TestCNBIntegrationWrongBuilderProject\|TestCNB...	2m 44s
Run integration tests ("TestCNBIntegrationPreserveFiles\b")	2m 30s
Run integration tests ("TestCNBIntegrationNPMProject")	3m 47s
Run integration tests ("TestCNBIntegrationMultiImage")	6m 27s
Run integration tests ("TestCNBIntegrationNPMCustomBuildpacksBuildpacklessProject")	2m 10s
Run integration tests ("TestCNBIntegrationNPMCustomBuildpacksFullProject")	2m 13s
Run integration tests ("TestCNBIntegrationProjectDescriptor")	2m 26s
Run integration tests ("TestGolangIntegration")	3m 2s
Run integration tests ("TestGradleIntegration")	2m 12s
Run integration tests ("TestMavenIntegration")	2m 31s
Run integration tests ("TestMTAIntegration")	2m 32s
Run integration tests ("TestTmsUploadIntegration")	1m 4s
Run integration tests ("TestTmsExportIntegration")	1m 0s
Run integration tests ("Test(Gauge\|GCS\|GitHub\|GitOps\|Influx\|NPM\|Piper\|Python\|Sonar\|Vault\|Karma)In...	3m 14s
Finish	2s
	41m 14s

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