qa/config/crimson_qa_overrides: adjust mgr_stats_period

Some test jobs fail with `local_shared_foreign_ptr: Assertion `ptr && *ptr' failed`
It seems that we attempt to use a connection which is not yet ready to use
after setting up the daemons on boot.
Adjust the mgr_stats_period to allow more time for the daemons to set up.
See: https://tracker.ceph.com/issues/62162#note-10

Note: This is not a fix but more of a temporary solution to avoid noise
      in the testing suite (Tracker stays open).

Signed-off-by: Matan Breizman <[email protected]>

Author: Matan-B

qa/config/crimson_qa_overrides.yaml

@@ -9,6 +9,8 @@ overrides:
         osd pool default crimson: true
       osd:
         crimson osd obc lru size: 10
+      mgr:
+        mgr stats period: 30
     flavor: crimson
   workunit:
     env: