v1.15.0-rc2

* BUGFIXES
  * Restore creation of git-daemon-export-ok files (#16508) (#16514)
  * Fix data race in bleve indexer (#16474) (#16509)
  * Restore CORS on git smart http protocol (#16496) (#16506)
  * Fix race in log (#16490) (#16505)
  * Fix prepareWikiFileName to respect existing unescaped files (#16487) (#16498)
  * Make cancel from CatFileBatch and CatFileBatchCheck wait for the command to end (#16479) (#16480)
  * Update notification table with only latest data (#16445) (#16469)
  * Revert to use alpine 3.13 to fix multiple seccomp related issues with Docker <20 (#16451) (#16452)
  * Fix crash following ldap authentication update (#16447) (#16448)
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