feat: add sso-host flag for OAuth2 login configuration (#22738)

[PaleHazy]

Closes #22738

I updated the login and relogin command to have the ability to overwrite the callback scheme, host and port as one flag for the local server

this is necessary for some environments that are not the local machine and need to be redirected elsewhere from the idp.

I did not see any unit tests that were testing changing the port so I figured this would be fine. I can add some if there is a want for the callback validation

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.
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• I've updated documentation as required by this PR.
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[PaleHazy]

I am not sure if I should change

bindAddr := net.JoinHostPort(host, strconv.Itoa(port))
oauth2conf.RedirectURL = fmt.Sprintf("http://%s/auth/callback", bindAddr)

...

srv := &http.Server{Addr: bindAddr}

to actually bind to localhost instead hardcoded

...

srv := &http.Server{Addr: net.JoinHostPort("localhost", strconv.Itoa(port))}

[codecov]

Codecov Report

❌ Patch coverage is 36.36364% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 60.42%. Comparing base (f4c4c66) to head (9584283).
⚠️ Report is 14 commits behind head on master.

Files with missing lines	Patch %	Lines
cmd/argocd/commands/login.go	25.00%	6 Missing ⚠️
cmd/argocd/commands/relogin.go	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #22784      +/-   ##
==========================================
- Coverage   60.46%   60.42%   -0.05%     
==========================================
  Files         350      350              
  Lines       60105    60113       +8     
==========================================
- Hits        36345    36325      -20     
- Misses      20828    20849      +21     
- Partials     2932     2939       +7     

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[agaudreault]

LGTM. You need to run make codegen-local to generate the docs