chore: update default min TLS to 1.3

[sozercan]

Signed-off-by: Sertac Ozercan sozercan@gmail.com

What this PR does / why we need it:
As discussed in #1424, TLS 1.3 should be default in next version

Which issue(s) this PR fixes (optional, using fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when the PR gets merged):
Fixes #1670

Special notes for your reviewer:

[codecov-commenter]

Codecov Report

Merging #1866 (9b448d4) into master (b8bf07f) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1866      +/-   ##
==========================================
- Coverage   52.18%   52.17%   -0.02%     
==========================================
  Files         100      100              
  Lines        8952     8952              
==========================================
- Hits         4672     4671       -1     
- Misses       3905     3906       +1     
  Partials      375      375              

Flag	Coverage Δ
unittests	52.17% <ø> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/webhook/common.go	66.00% <ø> (ø)
pkg/watch/replay.go	78.97% <0.00%> (-2.28%)	⬇️
pkg/readiness/object_tracker.go	82.91% <0.00%> (-1.07%)	⬇️
...onstrainttemplate/constrainttemplate_controller.go	58.89% <0.00%> (+0.72%)	⬆️
pkg/controller/config/config_controller.go	65.04% <0.00%> (+1.32%)	⬆️

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[ritazh]

lgtm

[maxsmythe]

LGTM