Rename all string occurrences from 'custom-authentication' to 'custom-authenticator' for consistency

[Shenali-SJ]

Purpose

This PR refactors all the string occurrences such as variables, functions. files etc. should be refactored from authentication to authenticator with regards to custom authenticator feature introduction in the identity apps code base.

Related Issue

• Rename all string occurrences from 'custom-authentication' to 'custom-authenticator' for consistency product-is#22952

[Shenali-SJ]

This is required since initially the authenticator was named as "Custom Authentication". After careful consideration the team agreed to refactor the name to "Custom Authenticator" in order to preserve the consistency of the connections page.

cc: @malithie @jeradrutnam

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 47.03%. Comparing base (bff0c52) to head (1c7d1e3).
Report is 52 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6500      +/-   ##
============================================
- Coverage     47.20%   47.03%   -0.18%     
- Complexity    15299    15309      +10     
============================================
  Files          1747     1747              
  Lines        105397   105858     +461     
  Branches      19518    19628     +110     
============================================
+ Hits          49757    49792      +35     
- Misses        48580    48988     +408     
- Partials       7060     7078      +18     

Flag	Coverage Δ
unit	30.49% <ø> (+<0.01%)	⬆️

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