RHOAIENG-11709: Adding a release github action

[etirelli]

In order to publish the elyra packages to pypi, push a tag with the format v<version> to the repository.

Fixes: https://issues.redhat.com/browse/RHOAIENG-11709

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[harshad16]

lgtm on the setup
The token needs to be gather and included.
Tested a dry-run; https://github.com/harshad16/elyra/actions/runs/10800742648/job/29959417327

[harshad16]

Trusted published is set on the pypi,
https://docs.pypi.org/trusted-publishers/adding-a-publisher/
we are all set for this project.

[harshad16]

Some changes:

[harshad16]

/lgtm
/approve

Tested few dry-runs:
https://github.com/harshad16/elyra/actions/runs/10902517888/job/30254592424
https://github.com/harshad16/elyra/actions/runs/10902445197/job/30254347935