feat: rename app identifier

[pasha-codefresh]

#6425

PR introduces system-level resource tracking method setting that allows using annotation
instead of label to track application resources. PR does not cover the whole feature.
Following parts will be converted in follow PRs:

• Ability define tracking method on application level, PR
• New tracking method value template PR
• E2E tests PR

[codecov]

Codecov Report

Merging #7251 (4e705a3) into master (3952f66) will increase coverage by 0.04%.
The diff coverage is 60.93%.

@@            Coverage Diff             @@
##           master    #7251      +/-   ##
==========================================
+ Coverage   41.11%   41.15%   +0.04%     
==========================================
  Files         160      161       +1     
  Lines       21505    21553      +48     
==========================================
+ Hits         8842     8871      +29     
- Misses      11398    11415      +17     
- Partials     1265     1267       +2     

Impacted Files	Coverage Δ
cmd/argocd/commands/admin/app.go	30.90% <0.00%> (ø)
cmd/argocd/commands/app.go	0.54% <0.00%> (-0.01%)	⬇️
controller/cache/cache.go	10.50% <0.00%> (-0.12%)	⬇️
pkg/apis/application/v1alpha1/types.go	57.51% <ø> (ø)
util/settings/settings.go	46.70% <0.00%> (-0.51%)	⬇️
server/application/application.go	32.80% <66.66%> (+0.03%)	⬆️
util/argo/resource_tracking.go	68.42% <68.42%> (ø)
reposerver/repository/repository.go	60.94% <80.00%> (+0.09%)	⬆️
util/kube/kube.go	71.92% <83.33%> (+3.04%)	⬆️
controller/appcontroller.go	53.30% <100.00%> (ø)
... and 5 more

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[alexmt]

Thank you @pasha-codefresh !

Added one suggestion to rename setting key and couple minor comments about tests.
Can you please update PR description as well so that everyone understands which part of feature it covers. E.g.

PR introduces system-level resource tracking method setting that allows using annotation 
instead of label to track application resources. PR does not cover the whole feature. 
Following parts will be converted in follow PRs:

* ...
* ...

[alexmt]

LGTM

[cten]

I know this has been merged but what version will this be available in?

[pasha-codefresh]

2.2 @cten