Fix various GHA workflow bugs

[gregorydlogan]

This PR does a number of things:

• Renaming workflows and steps to match the admin UI's implementation with d260dd5, 5c2b45f, 5bff5b9, and c0cddf3.
• Fixing crowdin's upload. Previous implementation relied on main, so this may trigger some updates? Commits 20f0401, and 7a08e27.
• Fixes some formatting issues with b1e7d46
• Fixing a bug where we're missing the https part of a URL. Presumably this was working by browser magic, but it's unclear. Fixed with b5f82e8
• Dropping the requirement that a PR author be a team member prior to building and deploying a test instance. I've left the check in with a note that it's defunct in case this becomes an issue and we want to quickly revert it. d07c86b. If we decide we want this check, we should probably implement it on the admin side too since the same concerns would be present there.
• Updating the comment that the bot makes if we rebuild things, rather than making a new comment. This ensures the bot's URL is always right, rather than keeping old and potentially broken URLs in the comment tree. f433ca2

This PR also includes #1644, so maybe review that one first.

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This pull request is deployed at test.editor.opencast.org/1645/2025-10-17_23-38-03/ .
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[github-actions]

This pull request is deployed at test.editor.opencast.org/1645/2025-10-28_21-15-34/ .
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[github-actions]

This pull request is deployed at test.editor.opencast.org/1645/2025-10-28_21-23-34/ .
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This pull request is deployed at test.editor.opencast.org/1645/2025-11-20_04-11-31/ .
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