Create get_latest_copr_build script

[fernflower]

7to8 and 8to9 upstream regression testing has shown that we need some tooling to get most recent leapp-repository's master copr build id.

So shamelessly copying the refactored utils/get_latest_copr_build script from leapp-repository to be used in tmt-tests workflow.

[github-actions[bot]]

Thank you for contributing to the Leapp project!

Please note that every PR needs to comply with the Leapp Guidelines and must pass all tests in order to be mergable. If you want to re-run tests or request review, you can use following commands as a comment:

• leapp-ci build to run copr build and e2e tests in OAMG CI
• review please to notify leapp developers of review request
• /packit copr-build to submit a public copr build using packit

Please open ticket in case you experience technical problem with the CI. (RH internal only)

Note: In case there are problems with tests not being triggered automatically on new PR/commit or pending for a long time, please consider rerunning the CI by commenting leapp-ci build (might require several comments). If the problem persists, contact leapp-infra.

[centos-ci]

Can one of the admins verify this patch?

[pirat89]

@fernflower fix pls commit msg to keep the expected format

title

description

(hint: the missing new line between title & description)