remove verbose wording on layout toolbar buttons (fix #30161)

[alexbruy]

Description

As discussed in #30161 remove verbose wording on layout toolbar buttons. Fixes #30161.

Checklist

• Commit messages are descriptive and explain the rationale for changes
• Commits which fix bugs include Fixes #11111 at the bottom of the commit message
• I have read the QGIS Coding Standards and this PR complies with them
• New unit tests have been added for core changes
• I have run the scripts/prepare-commit.sh script before each commit
• I have evaluated whether it is appropriate for this PR to be backported, backport requests are left as label or comment

[m-kuhn]

Looks good. But I don't think this should be backported, breaking translations is worse than some extra text on tooltips.