15.1.0.134-rc-1

chore: bump adminapi and admin-mgr binaries (#792)

* chore: bump admin-api and admin-mgr

* chore: init read-replica.conf
* and ensure it's accounted for everywhere

* chore: bump version

* chore: remove rc versioning

* chore: use admin-api v0.54.0 instead

* chore: include read-replica.conf from start