[meta] Release preparation steps for 11.5.0

Release preparation worksheet

11.5.0 release preparation spreadsheet Restricted access. This spreadsheet is a work in progress.

Release note drafts

#3601834: [meta] 11.5.0 milestone release notes

Release highligts draft

#3601842: 11.5.0 release announcement

Remaining tasks

Blocking issues

Issues to update dependencies and others deemed important for a stable release.

Issues tagged 11.5.0 alpha blocker .
Issues tagged 11.5.0 beta blocker .
Issues tagged 11.5.0 rc blocker .
Issues tagged 11.5.0 blocker .

Priority issues

Priority issues are not required for this release. They are important for maintaining progress on long term strategy or long term issues.
These issues may change and there is no guarantee that they will be in the release.

• Issues tagged 11.5.0 release priority
• #3589108: Refactor DeprecationHandler into a standard PHPUnit extension - most of DeprecationHandler code MUST probably go before D12 is out, if we need to support PHPUnit 13. If we do not backport, we may end up from fully supported usage of SYMFONY_DEPRECATIONS_HELPER env variable in 11 to removed in 12.