Revert "1.15.0rc1"

CHANGES.md

changelog.d/6585.feature

changelog.d/6637.feature

changelog.d/7263.bugfix

changelog.d/7267.bugfix

changelog.d/7385.feature

changelog.d/7481.feature

changelog.d/7561.misc

changelog.d/7567.misc

changelog.d/7575.bugfix

changelog.d/7584.misc

changelog.d/7585.bugfix

changelog.d/7586.feature

changelog.d/7587.doc

changelog.d/7591.misc

changelog.d/7594.bugfix

changelog.d/7595.misc

changelog.d/7597.bugfix

changelog.d/7599.bugfix

changelog.d/7600.misc