Account for "osdstats" key in newer versions

[ian28223]

What does this PR do?

ceph version 14.2.7 nautilus (also in ceph/daemon:v4.0.10-stable-4.0-nautilus-centos-7) now has osd_perf_infos key under osdstats.

Previously:

{
  "osd_perf_infos": [
    {
      "id": 0,
      "perf_stats": {
        "commit_latency_ms": 0,
        "apply_latency_ms": 0,
        "commit_latency_ns": 0,
        "apply_latency_ns": 0
      }
    }
  ]
}

Now:

{
  "pg_ready": true,
  "osdstats": {
    "osd_perf_infos": [
      {
        "id": 0,
        "perf_stats": {
          "commit_latency_ms": 0,
          "apply_latency_ms": 0,
          "commit_latency_ns": 0,
          "apply_latency_ns": 0
        }
      }
    ]
  }
}

Motivation

• 1944-ceph-int-missing-cephcommitlatencyms-applylatencyms

Additional Notes

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• PR title must be written as a CHANGELOG entry (see why)
• Files changes must correspond to the primary purpose of the PR as described in the title (small unrelated changes should have their own PR)
• PR must have changelog/ and integration/ labels attached

[codecov]

Codecov Report

Merging #5855 into master will increase coverage by 3.45%.
The diff coverage is 100%.

Impacted Files	Coverage Δ
ceph/tests/test_unit.py	100% <100%> (ø)	⬆️
ceph/datadog_checks/ceph/ceph.py	86.56% <100%> (+0.06%)	⬆️
vertica/tests/metrics.py
...checks_dev/tests/plugin/test_environment_runner.py
riakcs/datadog_checks/riakcs/riakcs.py
oracle/tests/test_oracle.py
...r/datadog_checks/openstack_controller/__about__.py
twistlock/datadog_checks/twistlock/twistlock.py
linkerd/datadog_checks/linkerd/linkerd.py
postgres/datadog_checks/postgres/postgres.py
... and 1010 more

[jforest]

Is there a timeframe for when the integration that has this change in it will be released? (and consequently when the agent that includes the updated integration will be released?)