windocker: `sign_verification` jobs failing for windows docker build pipelines

[sxa]

The sign job appears to be completing successfully when called from the windbld job, but the verification is failing. @steelhead31 has checked and there appears to be a valid Eclipse Signature on some of the files showing as failing in the logs.

I've locked job https://ci.adoptium.net/job/build-scripts/job/release/job/sign_verification/1588 to retain the output for now. That was started from https://ci.adoptium.net/job/build-scripts/job/jobs/job/jdk21u/job/windbld/110