Refactor: libcrmcommon: remove dead code

This breaks the public API by removing the following symbols:

• SERVICE_SCRIPT
• crm_remote_baremetal
• crm_remote_container
• crm_remote_peer_cache_add()
• crm_status_rstate (crm_status_nstate is now sent for all node types)
• get_cib_copy()
• pe_action_failure_is_fatal