CI: capture additional information if the server tests fail

[ptitzler]

Is your feature request related to a problem? Please describe.
Occasionally server tests (make pytest) fail because a new version of a package dependency was released. We should consider adding an additional CI step to https://github.com/elyra-ai/elyra/blob/main/.github/workflows/build.yml#L76-L95, which is only executed if the previous step https://github.com/elyra-ai/elyra/blob/main/.github/workflows/build.yml#L94 failed. This step could collect additional information that would enable us to determine more quickly if a failure might be the result of a dependency change that the build picked up.

Describe the solution you'd like
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• append a step to https://github.com/elyra-ai/elyra/blob/main/.github/workflows/build.yml#L76 that is executed only if https://github.com/elyra-ai/elyra/blob/main/.github/workflows/build.yml#L94 fails
• the step parses the output of pip freeze, retrieves for each package its metadata by sending an HTTP GET request to https://pypi.org/pypi/{PKG_NAME}/json, scans the release history and issues a message if a new package version was released within the past X days

Describe alternatives you've considered
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Additional context
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[tal66]

I'd like to do this. PR later today