Server: v30.0.4rc1 Release

What's Changed

• [stable30] fix(app-store): Add back legacy store API used for update and removal by @backportbot in https://github.com/nextcloud/server/pull/49216
• [stable30] fix(activity): make emails for link share uploads true by default by @backportbot in https://github.com/nextcloud/server/pull/49691
• chore(deps-dev): bump @nextcloud/cypress from 1.0.0-beta.8 to 1.0.0-beta.12 by @dependabot in https://github.com/nextcloud/server/pull/49713
• chore(deps-dev): bump @babel/node from 7.25.0 to 7.25.9 by @dependabot in https://github.com/nextcloud/server/pull/49712
• chore(deps-dev): bump cypress-split from 1.24.0 to 1.24.7 by @dependabot in https://github.com/nextcloud/server/pull/49716
• chore(deps): bump pinia from 2.2.6 to 2.2.8 by @dependabot in https://github.com/nextcloud/server/pull/49715
• chore(deps): bump @nextcloud/sharing from 0.2.3 to 0.2.4 by @dependabot in https://github.com/nextcloud/server/pull/49714
• [stable30] fix(files_sharing): Stop infinite loop blocking link share requests by @backportbot in https://github.com/nextcloud/server/pull/49724
• 30.0.4 RC1 by @blizzz in https://github.com/nextcloud/server/pull/49737

Full Changelog: https://github.com/nextcloud/server/compare/v30.0.3...v30.0.4rc1