Do not log node exists/shutdown status at default verbosity

[dlipovetsky]

What this PR does / why we need it:
Previously, the controller logged two lines for every node approximately every 7 seconds, or about 1000 lines per node, per hour.

For example:

I1227 18:39:59.655871       1 manager.go:190] Node my-cc-cluster-qh6fc-plnhl exists!
I1227 18:40:00.115157       1 manager.go:211] Node my-cc-cluster-qh6fc-plnhl is not shutdown!
I1227 18:40:00.693491       1 manager.go:190] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml exists!
I1227 18:40:01.242311       1 manager.go:211] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml is not shutdown!
I1227 18:40:06.775496       1 manager.go:190] Node my-cc-cluster-qh6fc-plnhl exists!
I1227 18:40:07.264917       1 manager.go:211] Node my-cc-cluster-qh6fc-plnhl is not shutdown!
I1227 18:40:07.747176       1 manager.go:190] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml exists!
I1227 18:40:08.179592       1 manager.go:211] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml is not shutdown!
I1227 18:40:13.675784       1 manager.go:190] Node my-cc-cluster-qh6fc-plnhl exists!
I1227 18:40:14.156767       1 manager.go:211] Node my-cc-cluster-qh6fc-plnhl is not shutdown!
I1227 18:40:14.635342       1 manager.go:190] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml exists!
I1227 18:40:15.065686       1 manager.go:211] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml is not shutdown!
I1227 18:40:20.463439       1 manager.go:190] Node my-cc-cluster-qh6fc-plnhl exists!
I1227 18:40:20.963273       1 manager.go:211] Node my-cc-cluster-qh6fc-plnhl is not shutdown!
I1227 18:40:21.388286       1 manager.go:190] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml exists!
I1227 18:40:21.864284       1 manager.go:211] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml is not shutdown!
I1227 18:40:27.416278       1 manager.go:190] Node my-cc-cluster-qh6fc-plnhl exists!
I1227 18:40:27.998769       1 manager.go:211] Node my-cc-cluster-qh6fc-plnhl is not shutdown!
I1227 18:40:28.646187       1 manager.go:190] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml exists!
I1227 18:40:29.131304       1 manager.go:211] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml is not shutdown!
I1227 18:40:34.683511       1 manager.go:190] Node my-cc-cluster-qh6fc-plnhl exists!
I1227 18:40:35.118103       1 manager.go:211] Node my-cc-cluster-qh6fc-plnhl is not shutdown!
I1227 18:40:35.694925       1 manager.go:190] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml exists!
I1227 18:40:36.122100       1 manager.go:211] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml is not shutdown!
I1227 18:40:41.666251       1 manager.go:190] Node my-cc-cluster-qh6fc-plnhl exists!
I1227 18:40:42.244924       1 manager.go:211] Node my-cc-cluster-qh6fc-plnhl is not shutdown!
I1227 18:40:42.669489       1 manager.go:190] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml exists!
I1227 18:40:43.234134       1 manager.go:211] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml is not shutdown!
I1227 18:40:48.753024       1 manager.go:190] Node my-cc-cluster-qh6fc-plnhl exists!
I1227 18:40:49.212019       1 manager.go:211] Node my-cc-cluster-qh6fc-plnhl is not shutdown!
I1227 18:40:49.864969       1 manager.go:190] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml exists!
I1227 18:40:50.358605       1 manager.go:211] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml is not shutdown!
I1227 18:40:55.896952       1 manager.go:190] Node my-cc-cluster-qh6fc-plnhl exists!
I1227 18:40:56.365655       1 manager.go:211] Node my-cc-cluster-qh6fc-plnhl is not shutdown!
I1227 18:40:56.908435       1 manager.go:190] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml exists!
I1227 18:40:57.474351       1 manager.go:211] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml is not shutdown!
I1227 18:41:03.086870       1 manager.go:190] Node my-cc-cluster-qh6fc-plnhl exists!
I1227 18:41:03.708390       1 manager.go:211] Node my-cc-cluster-qh6fc-plnhl is not shutdown!
I1227 18:41:04.286242       1 manager.go:190] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml exists!
I1227 18:41:04.694276       1 manager.go:211] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml is not shutdown!
I1227 18:41:10.260410       1 manager.go:190] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml exists!
I1227 18:41:10.911270       1 manager.go:211] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml is not shutdown!
I1227 18:41:11.510154       1 manager.go:190] Node my-cc-cluster-qh6fc-plnhl exists!
I1227 18:41:12.153530       1 manager.go:211] Node my-cc-cluster-qh6fc-plnhl is not shutdown!
I1227 18:41:17.836055       1 manager.go:190] Node my-cc-cluster-qh6fc-plnhl exists!
I1227 18:41:18.429313       1 manager.go:211] Node my-cc-cluster-qh6fc-plnhl is not shutdown!
I1227 18:41:18.988415       1 manager.go:190] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml exists!
I1227 18:41:19.486467       1 manager.go:211] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml is not shutdown!
I1227 18:41:25.096248       1 manager.go:190] Node my-cc-cluster-qh6fc-plnhl exists!
I1227 18:41:25.613627       1 manager.go:211] Node my-cc-cluster-qh6fc-plnhl is not shutdown!
I1227 18:41:26.205629       1 manager.go:190] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml exists!
I1227 18:41:26.784818       1 manager.go:211] Node my-cc-cluster-md-0-d8drs-g2hdp-q4xml is not shutdown!
I1227 18:41:32.304919       1 manager.go:190] Node my-cc-cluster-qh6fc-plnhl exists!
I1227 18:41:32.876564       1 manager.go:211] Node my-cc-cluster-qh6fc-plnhl is not shutdown!

Moreover, nearly identical messages are already logged in a different function, at verbosity level 1:

• cloud-provider-nutanix/pkg/provider/instances_v2.go

  Line 42 in 712bb7d

  klog.V(1).InfoS("InstanceExists", "node", node.Name, "exists", ok)

• cloud-provider-nutanix/pkg/provider/instances_v2.go

  Line 51 in 712bb7d

  klog.V(1).InfoS("InstanceShutdown", "node", node.Name, "shutdown", ok)

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

How Has This Been Tested?:

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration and test output

Special notes for your reviewer:

Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

Release note:

NONE

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9fc3562) 77.87% compared to head (9bf05d2) 77.60%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #118      +/-   ##
==========================================
- Coverage   77.87%   77.60%   -0.28%     
==========================================
  Files           6        6              
  Lines         330      326       -4     
==========================================
- Hits          257      253       -4     
  Misses         73       73              

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[thunderboltsid]

/lgtm
/approve

[tuxtof]

LGTM