feat: support adding labels and annotations to cluster secret (#7115)

[chetan-rns]

Signed-off-by: Chetan Banavikalmutt chetanrns1997@gmail.com

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Introduces flags to add labels and annotations while creating cluster secrets.

Example:

argocd cluster add api.server.example --label key=obj --annotation key2=obj2

Closes: #7115

[chetan-rns]

@alexmt I assumed we need this feature only while creating clusters. Should there be a provision to update them as well using --upsert?

[codecov]

Codecov Report

Merging #7139 (95c5807) into master (be884d2) will decrease coverage by 0.02%.
The diff coverage is 21.42%.

@@            Coverage Diff             @@
##           master    #7139      +/-   ##
==========================================
- Coverage   41.06%   41.04%   -0.03%     
==========================================
  Files         158      158              
  Lines       21274    21300      +26     
==========================================
+ Hits         8736     8742       +6     
- Misses      11285    11305      +20     
  Partials     1253     1253              

Impacted Files	Coverage Δ
cmd/argocd/commands/admin/cluster.go	0.00% <0.00%> (ø)
cmd/argocd/commands/cluster.go	5.68% <0.00%> (-0.23%)	⬇️
pkg/apis/application/v1alpha1/types.go	57.51% <0.00%> (-0.36%)	⬇️
cmd/util/cluster.go	41.17% <100.00%> (+1.78%)	⬆️
util/db/cluster.go	60.00% <100.00%> (+0.93%)	⬆️
util/settings/settings.go	47.15% <0.00%> (ø)

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[alexmt]

Thank you @chetan-rns ! Please address one comment about Equals method and it is good to go.

[alexmt]

Please update Equals method in types.go as well:

argo-cd/pkg/apis/application/v1alpha1/types.go

Line 1281 in bd7f8c8

func (c *Cluster) Equals(other *Cluster) bool {

It is used by Create API method to detect difference if cluster is already registered.

[chetan-rns]

Thanks! Updated Equals to return false on the mismatch of labels/annotations

[alexmt]

LGTM