bump k8s deps to 0.26 and bump generated code to include 1.26

[cfryanr]

Addresses #1374.

Release note:

bump k8s deps to 0.26

[codecov]

Codecov Report

Merging #1372 (23f6dd4) into main (3b46547) will decrease coverage by 0.02%.
The diff coverage is 64.28%.

@@            Coverage Diff             @@
##             main    #1372      +/-   ##
==========================================
- Coverage   75.50%   75.49%   -0.02%     
==========================================
  Files         167      167              
  Lines       14855    14857       +2     
==========================================
  Hits        11217    11217              
- Misses       3347     3350       +3     
+ Partials      291      290       -1     

Impacted Files	Coverage Δ
internal/controllerlib/option.go	22.00% <0.00%> (-0.69%)	⬇️
internal/upstreamoidc/upstreamoidc.go	90.14% <0.00%> (ø)
cmd/pinniped-server/main.go	100.00% <100.00%> (ø)
internal/concierge/impersonator/impersonator.go	82.54% <100.00%> (ø)
internal/controller/kubecertagent/kubecertagent.go	92.68% <100.00%> (ø)
...l/controller/kubecertagent/pod_command_executor.go	86.66% <100.00%> (-0.44%)	⬇️
internal/plog/config.go	61.11% <0.00%> (+1.85%)	⬆️

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[cfryanr]

In CI, when we use the latest go-boringcrypto compiler (currently Go 1.18), this PR fails to compile. The error is:

#17 28.37 # k8s.io/component-base/metrics
#17 28.37 /go/pkg/mod/k8s.io/component-base@v0.26.0/metrics/registry.go:35:29: undefined: atomic.Bool
#17 28.37 note: module requires Go 1.19

It seems that this k8s package is using a new atomic.Bool type that only exists in Go 1.19: https://github.com/kubernetes/kubernetes/blob/v1.26.0/staging/src/k8s.io/component-base/metrics/registry.go#L35

[cfryanr]

Updated the fips build to use Go 1.19 in this PR to avoid the issue mentioned above.

[joshuatcasey]

I created #1375 to capture removing psets in favor of k8s.io/apimachinery/pkg/util/sets (amongst other things)