use rustls-pki-types pem api

[tottoto]

Uses rustls-pki-types pem api directly.

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.

Project coverage is 75.8%. Comparing base (0bcc625) to head (c31d5ce).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
kube-client/src/client/tls.rs	66.7%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #1690     +/-   ##
=======================================
+ Coverage   75.8%   75.8%   +0.1%     
=======================================
  Files         84      84             
  Lines       7630    7629      -1     
=======================================
  Hits        5779    5779             
+ Misses      1851    1850      -1     

Files with missing lines	Coverage Δ
kube-client/src/client/tls.rs	82.8% <66.7%> (+1.0%)	⬆️

[clux]

Nice cleanup of that explicit dependency. Thank you.