Add SKIP_FAILJOB_ON_STOP_ERROR flag

[RickeyWard]

Allow passing jobs that fail to stop/rm in time. Some large builds can succeed and fail to stop due to timeouts (increasing the timeout is not always an adequate solution) more info JENKINS-42322 (this is marked resolved but is still getting comments and some like my time are still having issues)

The idea is that a docker error after the build succeeds should have an escape hatch to let jobs be marked as successful.

JAVA_OPTS=-Dorg.jenkinsci.plugins.docker.workflow.client.DockerClient.SKIP_FAILJOB_ON_STOP_ERROR=true

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  // Ensure you have provided tests - that demonstrates feature works or fixes the issue

I'm unsure how to write a test that doesn't have outside dependency on an image that exists just to hang, open to suggestions.