chore: k8s client 0.26

[blakepettersson]

This is based on #13965, which this time hopefully has been updated
and merged correctly to a currentish version of argo-cd.

The main difference here is that the gitops version is based upon
argoproj/gitops-engine#537, which should maintain pre-existing
labels and annotations.

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
• The title of the PR states what changed and the related issues number (used for the release note).
• The title of the PR conforms to the Toolchain Guide
• I've included "Closes [ISSUE #]" or "Fixes [ISSUE #]" in the description to automatically close the associated issue.
• I've updated both the CLI and UI to expose my feature, or I plan to submit a second PR with them.
• Does this PR require documentation updates?
• I've updated documentation as required by this PR.
• Optional. My organization is added to USERS.md.
• I have signed off all my commits as required by DCO
• I have written unit and/or e2e tests for my change. PRs without these are unlikely to be merged.
• My build is green (troubleshooting builds).
• My new feature complies with the feature status guidelines.
• I have added a brief description of why this PR is necessary and/or what this PR solves.

[codecov]

Codecov Report

Patch coverage: 46.34% and project coverage change: -0.05% ⚠️

Comparison is base (ae47e05) 50.03% compared to head (858dd26) 49.99%.
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #15571      +/-   ##
==========================================
- Coverage   50.03%   49.99%   -0.05%     
==========================================
  Files         266      266              
  Lines       45681    45754      +73     
==========================================
+ Hits        22857    22874      +17     
- Misses      20590    20634      +44     
- Partials     2234     2246      +12     

Files Changed	Coverage Δ
applicationset/utils/clusterUtils.go	68.33% <0.00%> (ø)
cmd/argocd/commands/admin/cluster.go	0.00% <0.00%> (ø)
cmd/util/project.go	12.14% <0.00%> (ø)
server/application/terminal.go	12.38% <0.00%> (ø)
util/db/cluster.go	59.87% <0.00%> (ø)
util/db/helmrepository.go	0.00% <0.00%> (ø)
util/db/secrets.go	78.99% <25.00%> (-2.21%)	⬇️
util/rbac/rbac.go	78.77% <25.00%> (-0.77%)	⬇️
util/settings/settings.go	49.63% <25.00%> (-0.48%)	⬇️
...cationset/controllers/applicationset_controller.go	62.05% <38.46%> (+0.46%)	⬆️
... and 5 more

... and 3 files with indirect coverage changes

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