Release 8.7.0

[juliusknorr]

Preparing for the summit release, main branch is already bumped to 9.0.0-dev.0 so we can increase the minor here without issues

Added

• feat: Add option to set secure view for public talk shares #4808

Fixed

• fix: Ensure edit permissions are checked before template file token generation #4797
• fix(CoolFrame): Init and accept postMessage for setting iframe height #4796
• fix: check if template fields should be extracted #4810

Other

• Revert "test: use nightly collabora build for now" #4790
• chore(test): add unit tests for RegisterTemplateFileCreatorListener #4821