fix(CDAP-20396): add repository store and get the config in repo manager factory

[de-lan]

What

This fix is regarding the comment from the push app PR: https://github.com/cdapio/cdap/pull/14911#discussion_r1110449620

The idea is to get the repo config from its own store and split out the access control in SCM service layer. While creating the RepositoryManager, RepositoryConfig should not be passed in from service layer and should only be fetched by the bound namespace ID.