Introduce persistence layer to store SAML configurations

[Osara-B]

Proposed changes in this pull request

$subject as the initial implementation to decouple storage type from the configuration management.

• SAMLSSOServiceProviderDAO interface acts as the storage independent interface to handle SAML configurations
• SAMLSSOServiceProviderRegistryDAOImpl acts as the registry implementation of the above interface

[sonarqubecloud]

Quality Gate failed

Failed conditions
7.2% Duplication on New Code (required ≤ 3%)

See analysis details on SonarQube Cloud

[jenkins-is-staging]

PR builder started
Link: https://github.com/wso2/product-is/actions/runs/12425835334

[codecov]

Codecov Report

Attention: Patch coverage is 62.77533% with 169 lines in your changes missing coverage. Please review.

Project coverage is 45.61%. Comparing base (9dbc3dd) to head (35e06e5).
Report is 13 commits behind head on master.

Files with missing lines	Patch %	Lines
...ore/dao/SAMLSSOServiceProviderRegistryDAOImpl.java	65.97%	103 Missing and 44 partials ⚠️
...y/core/persistence/IdentityPersistenceManager.java	0.00%	14 Missing ⚠️
...n/identity/core/SAMLSSOServiceProviderManager.java	0.00%	8 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6238      +/-   ##
============================================
- Coverage     45.67%   45.61%   -0.06%     
- Complexity    14056    14058       +2     
============================================
  Files          1632     1631       -1     
  Lines        100532   101479     +947     
  Branches      17629    17913     +284     
============================================
+ Hits          45918    46292     +374     
- Misses        47925    48486     +561     
- Partials       6689     6701      +12     

Flag	Coverage Δ
unit	28.31% <62.77%> (+0.01%)	⬆️

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[jenkins-is-staging]

PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/12425835334
Status: success

[jenkins-is-staging]

Approving the pull request based on the successful pr build https://github.com/wso2/product-is/actions/runs/12425835334