Improve authentication name validation.

[Thisara-Welmilla]

Issue:

• Improve authenticator name and display name validation for user defined authenticators product-is#22063

Following improvements need to be done to the custom authentication management.

1. Addressing Naming Conflicts for User-Defined and future System-Defined Authenticators
   Currently, for user-defined authenticators, it is checking for any conflict with system-defined names making authenticator name unique.
   The reqirement is to have unique identifier for the amr values. However, with the implementation so far, if a custom authenticator is created with the name whatsappAuthenticator and we later introduce a system authenticator with the same name, it would result in a conflict. There improve authenticator name regex validation to check whether authenticator name start with custom- prefix with atleast three charactors.
2. In addtion to above validate authenticator name uniqueness across both local and federared authenticator names.
3. Improve display name validation to check whether it has atleast three charactors.

[jenkins-is-staging]

PR builder started
Link: https://github.com/wso2/product-is/actions/runs/12850786254

[codecov]

Codecov Report

Attention: Patch coverage is 72.09302% with 12 lines in your changes missing coverage. Please review.

Project coverage is 46.20%. Comparing base (368134f) to head (f553489).
Report is 65 commits behind head on master.

Files with missing lines	Patch %	Lines
...cation/common/ApplicationAuthenticatorService.java	57.14%	4 Missing and 2 partials ⚠️
...ommon/dao/impl/AuthenticatorManagementDAOImpl.java	80.00%	2 Missing ⚠️
...common/dao/impl/AuthenticatorManagementFacade.java	60.00%	2 Missing ⚠️
...g/wso2/carbon/idp/mgt/IdentityProviderManager.java	60.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6288      +/-   ##
============================================
+ Coverage     45.91%   46.20%   +0.28%     
+ Complexity    14481    14454      -27     
============================================
  Files          1672     1672              
  Lines        103141   102230     -911     
  Branches      18010    17876     -134     
============================================
- Hits          47360    47238     -122     
+ Misses        48970    48220     -750     
+ Partials       6811     6772      -39     

Flag	Coverage Δ
unit	29.30% <72.09%> (+0.13%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[jenkins-is-staging]

PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/12850786254
Status: failure

[jenkins-is-staging]

PR builder started
Link: https://github.com/wso2/product-is/actions/runs/12854554991

[jenkins-is-staging]

PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/12854554991
Status: failure

[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

[jenkins-is-staging]

PR builder started
Link: https://github.com/wso2/product-is/actions/runs/12861003816

[jenkins-is-staging]

PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/12861003816
Status: failure

[Thisara-Welmilla]

PR builder completed Link: https://github.com/wso2/product-is/actions/runs/12861003816 Status: failure

The failing integration tests are due to error messages changes, with the wso2/product-is#22265 they will be addressed.