Add missing teardown to a few cloud tests

[radeusgd]

Pull Request Description

• Every Temporary_Directory should have cleanup registered in the teardown of a test group: added 2 missing ones and a doc reminding to do that.
• Tried automatically detecting missed ones but simple solution failed to work - not continuing for now.
• Added Image_Tests to cloud test run as some data link integration tests are there.

Important Notes

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• The documentation has been updated, if necessary.
• Screenshots/screencasts have been attached, if there are any visual changes. For interactive or animated visual changes, a screencast is preferred.
• All code follows the
  Scala,
  Java,
  TypeScript,
  and
  Rust
  style guides. In case you are using a language not listed above, follow the Rust style guide.
• Unit tests have been written where possible.
• If meaningful changes were made to logic or tests affecting Enso Cloud integration in the libraries,
  or the Snowflake database integration, a run of the Extra Tests has been scheduled.
  • If applicable, it is suggested to paste a link to a successful run of the Extra Tests.