Fix log collection in Selenium workflows (backport #13425)

[mergify]

Proposed Changes

Prior to this commit, if a test failed, the script 'run-suites.sh' would
exit with non-zero status, stopping the exection of the job; therefore,
the steps to move the logs to the expected location won't be executed.
This commit separates the tests from the log preparation.

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• Bug fix (non-breaking change which fixes issue #NNNN)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause an observable behavior change in existing systems)
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• Cosmetic change (whitespace, formatting, etc)
• Build system and/or CI

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This is an automatic backport of pull request #13425 done by [Mergify](https://mergify.com).