Update dependencies, including Kube packages to v0.29.0

[cfryanr]

There are some significant changes introduced by the Kube 1.29 libs. This PR:

• updates dependencies, including updating the replace directives to make things compile again
• fixes the resulting compilation errors
• updates some unit test expectations based on changes in the updated deps
• disables the UnauthenticatedHTTP2DOSMitigation (for now) due to Aggregated API servers are unexpectedly throttled when making anonymous requests due to the UnauthenticatedHTTP2DOSMitigation feature gate kubernetes/kubernetes#122308
• fixes a startup crash in the Concierge, Supervisor, and impersonation proxy servers caused by changes inside the Kube apiserver library's RecommendedOptions.ApplyTo() function's implementation
• fixes a bug in the hack/update-copyright-year.sh helper script which accidentally hardcoded the year 2023

Release note:

Updated project dependencies

[codecov]

Codecov Report

Attention: 27 lines in your changes are missing coverage. Please review.

Comparison is base (659224a) 79.11% compared to head (c7299f4) 79.08%.

Files	Patch %	Lines
internal/crypto/ptls/ptls.go	0.00%	16 Missing ⚠️
internal/concierge/server/server.go	0.00%	9 Missing ⚠️
internal/concierge/impersonator/impersonator.go	83.33%	0 Missing and 1 partial ⚠️
internal/config/featuregates/featuregates.go	80.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1825      +/-   ##
==========================================
- Coverage   79.11%   79.08%   -0.04%     
==========================================
  Files         173      173              
  Lines       16178    16207      +29     
==========================================
+ Hits        12800    12817      +17     
- Misses       3058     3070      +12     
  Partials      320      320              

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[cfryanr]

Note: Before we merge, I want to squash the commits. There was an intermediate approach in one of the commits which was then rewritten in a later commit. If everything works, there is no need to keep the intermediate commits.

[benjaminapetersen]

lgtm per review over zoom.