`npm config` doesn't fail when `workspaces` enabled (#5120) #857

Job	Run time
Start	6s
Build Piper	1m 19s
Build integration tests	20s
Run integration tests ("(TestCNBIntegrationBindings\|TestCNBIntegrationWrongBuilderProject\|TestCNB...	1m 44s
Run integration tests ("TestCNBIntegrationPreserveFiles\b")	1m 26s
Run integration tests ("TestCNBIntegrationNPMProject")	2m 17s
Run integration tests ("TestCNBIntegrationMultiImage")	2m 31s
Run integration tests ("TestCNBIntegrationNPMCustomBuildpacksBuildpacklessProject")	1m 42s
Run integration tests ("TestCNBIntegrationNPMCustomBuildpacksFullProject")	1m 23s
Run integration tests ("TestCNBIntegrationProjectDescriptor")	1m 18s
Run integration tests ("TestCNBIntegrationPrePostBuildpacks")	1m 21s
Run integration tests ("TestGolangIntegration")	2m 1s
Run integration tests ("TestGradleIntegration")	1m 25s
Run integration tests ("TestMavenIntegration")	1m 50s
Run integration tests ("TestMTAIntegration")	2m 2s
Run integration tests ("TestTmsUploadIntegration")	55s
Run integration tests ("TestTmsExportIntegration")	46s
Run integration tests ("Test(Gauge\|GCS\|GitHub\|GitOps\|Influx\|NPM\|Piper\|Python\|Sonar\|Vault\|Karma)In...	1m 15s
Finish	1s
	25m 42s

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