util: fix bug in health checker

[Rakshith-R]

Describe what this PR does

This commit fixes a bug in health checker that
caused shared checker to get keyed with volumeID+volumepath instead of just volumeID and the other way around
for non-shared checkers.

unit test runs:

rakshithr4@fedora:~/Workspace/github.com/ceph/ceph-csi$ /usr/local/go/bin/go test -timeout 30s -tags ceph_preview -run ^TestTwoNonSharedChecker$ githu
b.com/ceph/ceph-csi/internal/health-checker -v
=== RUN   TestTwoNonSharedChecker
=== PAUSE TestTwoNonSharedChecker
=== CONT  TestTwoNonSharedChecker
    manager_test.go:99: start the first checker
    manager_test.go:105: check health for first path, should be healthy
    manager_test.go:111: check health for second path, should error out since checker is not started
    manager_test.go:113: 
                Error Trace:    /home/rakshithr4/Workspace/github.com/ceph/ceph-csi/internal/health-checker/manager_test.go:113
                Error:          An error is expected but got nil.
                Test:           TestTwoNonSharedChecker
    manager_test.go:115: start the second checker
    manager_test.go:121: check health, should be healthy
    manager_test.go:127: stop the first checker
    manager_test.go:130: check health of second path, should still be healthy
    manager_test.go:136: stop the second checker
--- FAIL: TestTwoNonSharedChecker (0.00s)
FAIL
FAIL    github.com/ceph/ceph-csi/internal/health-checker        0.005s
FAIL
rakshithr4@fedora:~/Workspace/github.com/ceph/ceph-csi$ git diff
diff --git a/internal/health-checker/manager.go b/internal/health-checker/manager.go
index ed78ec6fa..6a08e6b3d 100644
--- a/internal/health-checker/manager.go
+++ b/internal/health-checker/manager.go
@@ -137,7 +137,8 @@ func (hcm *healthCheckManager) startStatChecker(volumeID, path string, shared bo
 // are key'd by theit volumeID+path.
 func (hcm *healthCheckManager) startChecker(cc ConditionChecker, volumeID, path string, shared bool) error {
        key := volumeID
-       if shared {
+       if !shared {
+               // if it is non-shared checker, try to use the path as well.
                key = fallbackKey(volumeID, path)
        }
 
diff --git a/internal/health-checker/manager_test.go b/internal/health-checker/manager_test.go
rakshithr4@fedora:~/Workspace/github.com/ceph/ceph-csi$ /usr/local/go/bin/go test -timeout 30s -tags ceph_preview -run ^TestTwoNonSharedChecker$ github.com/ceph/ceph-csi/internal/health-checker -v
=== RUN   TestTwoNonSharedChecker
=== PAUSE TestTwoNonSharedChecker
=== CONT  TestTwoNonSharedChecker
    manager_test.go:99: start the first checker
    manager_test.go:105: check health for first path, should be healthy
    manager_test.go:111: check health for second path, should error out since checker is not started
    manager_test.go:115: start the second checker
    manager_test.go:121: check health, should be healthy
    manager_test.go:127: stop the first checker
    manager_test.go:130: check health of second path, should still be healthy
    manager_test.go:136: stop the second checker
--- PASS: TestTwoNonSharedChecker (0.00s)
PASS
ok      github.com/ceph/ceph-csi/internal/health-checker        0.005s

Checklist:

• Commit Message Formatting: Commit titles and messages follow
  guidelines in the developer
  guide.
• Reviewed the developer guide on Submitting a Pull
  Request
• Pending release
  notes
  updated with breaking and/or notable changes for the next major release.
• Documentation has been updated, if necessary.
• Unit tests have been added, if necessary.
• Integration tests have been added, if necessary.

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✅ The pull request has been merged automatically

The pull request has been merged automatically at 86f2ad9

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