Emit certs OK event on startup, if no certs need renewal

[brandond]

Proposed Changes

Emit certs OK event on startup, if no certs need renewal

Note that this this event will be emitted once on startup whenever certs are OK, NOT only when certs previously needed renewal as proposed in the linked issue. There are other events that are also emitted by core Kubernetes components every time K3s starts, so this should be fine.

Types of Changes

enhancement

Verification

Check for event on startup, when all certs are OK.

Testing

Linked Issues

• Certificate expiration events persist after certificates are rotated #12107

User-Facing Change

Further Comments

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 10 lines in your changes missing coverage. Please review.

Project coverage is 20.01%. Comparing base (d56e4e8) to head (d44545b).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/certmonitor/certmonitor.go	0.00%	10 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (d56e4e8) and HEAD (d44545b). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (d56e4e8)	HEAD (d44545b)
e2etests	1	0

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #12645       +/-   ##
===========================================
- Coverage   40.65%   20.01%   -20.65%     
===========================================
  Files         186      183        -3     
  Lines       19299    19239       -60     
===========================================
- Hits         7846     3850     -3996     
- Misses      10257    14955     +4698     
+ Partials     1196      434      -762     

Flag	Coverage Δ
e2etests	?
unittests	20.01% <0.00%> (-0.01%)	⬇️

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