Use proc-recieve hook in receive-pack RPCs

When invoked, the proc-receive hook becomes responsible for updating references matching a configured pattern. Using this hook can allow for more fine-grained control regarding when references are accepted or rejected. Setup the receive-pack RPCs to begin executing the proc-receive hook when transactions are enabled. In a future commit, we will take advantage of the proc-receive hook by committing the transaction during hook execution.

Related: #5991