[P2 Bug] Fix Own Tempo Rockruff not being able to evolve

[PigeonBar]

What are the changes the user will see?

Own Tempo Rockruff will be able to evolve into Dusk Lycanroc.

• Bug report: Discord

Why am I making these changes?

Fixing a bug.

What are the changes from a developer perspective?

Own Tempo Rockruff's evolution condition now checks for the Rockruff to have form key "own-tempo" instead of "". (This has been broken for a while but did not matter until #4581.)

Screenshots/Videos

Before the changes: Own Tempo Rockruff cannot evolve

20241029.Rockruff.No.Evo.mp4

After the changes: Own Tempo Rockruff evolves properly

20241029.Rockruff.Dusk.Evo.mp4

After the changes: Regular Rockruff evolves properly

20241029.Rockruff.Midnight.Evo.mp4

How to test the changes?

All of Rockruff's evolutions occur level 25.

Checklist

• I'm using beta as my base branch
• There is no overlap with another PR?
• The PR is self-contained and cannot be split into smaller PRs?
• Have I provided a clear explanation of the changes?
• Have I considered writing automated tests for the issue?
• [ ] If I have text, did I make it translatable and add a key in the English locale file(s)?
• Have I tested the changes (manually)?
  • Are all unit tests still passing? (npm run test)
• [ ] Are the changes visual?
  • Have I provided screenshots/videos of the changes?