mgr/influx: revise perf counter handling

mgr/influx: revise perf counter handling

- Use new get_all_perf_counters path
- Consequently get counters for all daemons, not just OSD
- Tag stats with ceph_daemon rather than osd_id, as some
  stats appear from more than one daemon type
- Remove summing of perf counters, external TSDB and/or queries
  can do this.
- Remove mgr_id tag: this would change depending on which
  mgr was active, which is certainly not desirable.

Signed-off-by: John Spray <john.spray@redhat.com>
(cherry picked from commit 59b48e7660f4b757804974835027cd08a59843c2)