feat: Introduce diff normalizer knobs and allow for ignoring aggregated cluster roles (#2382)

[jannfis]

This PR introduces options for the diff normalizer to allow tuning its behaviour for well-known K8s behaviours.

The first use case is to ignore the rules in aggregated cluster roles, which are dynamically determined by K8s at runtime and would be out-of-sync always. This will fix #2382

A new setting resource.compareoptions is introduced in argocd-cm, which hold knobs to control behaviour of the diff normalizer.

By setting ignoreAggregratedRoles in resource.compareoptions to true, the rules will not be considered for determining the sync state of the role.

The default value of ignoreAggregratedRoles will be false to not change behaviour from previous versions of ArgoCD.

The new knob can be set like follows in argocd-cm:

resource.compareoptions: |
    ignoreAggregatedRoles: true

It's only valid system wide, not on a per-application basis.

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).
• I've updated both the CLI and UI to expose my feature, or I plan to submit a second PR with them.
• Optional. My organization is added to the README.
• I've signed the CLA and my build is green (troubleshooting builds).

[jannfis]

Since CompareAppState does not return faulty (no error return value), I deliberately chose to use default compare options if we can not get the options from the settings manager.

[codecov]

Codecov Report

Merging #3076 into master will decrease coverage by 5.38%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3076      +/-   ##
==========================================
- Coverage   44.47%   39.09%   -5.39%     
==========================================
  Files         184       49     -135     
  Lines       21006     1407   -19599     
  Branches      275      238      -37     
==========================================
- Hits         9342      550    -8792     
+ Misses      10625      854    -9771     
+ Partials     1039        3    -1036     

Impacted Files	Coverage Δ
ui/src/app/applications/components/utils.tsx	49.83% <0.00%> (ø)
ui/src/app/shared/services/projects-service.ts	19.71% <0.00%> (ø)
util/dex/config.go
util/rand/rand.go
util/util.go
util/hook/helm/type.go
util/hook/helm/hook.go
util/app/path/path.go
controller/cache/node.go
cmd/argocd/commands/project.go
... and 122 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update f822d09...cc48d7f. Read the comment docs.

[jannfis]

@jessesuen This is the second attempt to introduce #2382, and I followed your (absolutely correct) suggestions from previous PR #2422 (which probably was way overengineered). I think the current approach is better and more simple.

@alexmt I understand that this change interferes a little with changes in #3066 - it's up to you wether we merge this one first and adapt changes in #3066, or merge #3066 first and then adapt changes here for further merging.

[alexmt]

LGTM