Add config changes to support multiple email addresses and mobile numbers per user

[PasinduYeshan]

Reverts #5998, these changes were reverted due to following integration test failure.

 [ERROR] Failures: 
 [ERROR] org.wso2.identity.integration.test.scim2.rest.api.customSchema.SCIM2CustomSchemaUserTestCase.createClaims(org.wso2.identity.integration.test.scim2.rest.api.customSchema.SCIM2CustomSchemaUserTestCase)
 [ERROR] Run 1: SCIM2CustomSchemaUserTestCase.createClaims:153 » NoSuchMethod org.wso2.carbon....
 [ERROR] Run 2: SCIM2CustomSchemaUserTestCase.createClaims:153 » NoSuchMethod org.wso2.carbon....

This failure is addressed in following PR.

• Fix SCIM custom claim dialect related test issue product-is#21294

Local integration tests (is-tests-scim2) were executed against the changes, and the build completed successfully.

[jenkins-is-staging]

PR builder started
Link: https://github.com/wso2/product-is/actions/runs/11249280604

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 40.17%. Comparing base (278ba34) to head (2ff90f5).
Report is 13 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #6001   +/-   ##
=========================================
  Coverage     40.16%   40.17%           
  Complexity    14170    14170           
=========================================
  Files          1734     1734           
  Lines        116973   116957   -16     
  Branches      20027    20022    -5     
=========================================
  Hits          46988    46988           
+ Misses        62766    62750   -16     
  Partials       7219     7219           

Flag	Coverage Δ
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[jenkins-is-staging]

PR builder completed
Link: https://github.com/wso2/product-is/actions/runs/11249280604
Status: failure

[PasinduYeshan]

PR builder completed Link: https://github.com/wso2/product-is/actions/runs/11249280604 Status: failure

Only expected test cases were failed.

[ERROR] Failures: 
 [ERROR] org.wso2.identity.integration.test.scim2.SCIM2UserTestCase.testAddUserFailure(org.wso2.identity.integration.test.scim2.SCIM2UserTestCase)
 [INFO] Run 1: PASS
 [ERROR] Run 2: SCIM2UserTestCase.testAddUserFailure:272 expected:<1> but was:<3>
 [INFO] 
 [ERROR] org.wso2.identity.integration.test.scim2.rest.api.customSchema.SCIM2CustomSchemaUserTestCase.createClaims(org.wso2.identity.integration.test.scim2.rest.api.customSchema.SCIM2CustomSchemaUserTestCase)
 [ERROR] Run 1: SCIM2CustomSchemaUserTestCase.createClaims:153 » NoSuchMethod org.wso2.carbon....
 [ERROR] Run 2: SCIM2CustomSchemaUserTestCase.createClaims:153 » NoSuchMethod org.wso2.carbon....
 [INFO] 
 [INFO] 
 [ERROR] Tests run: 2612, Failures: 2, Errors: 0, Skipped: 7

Therefore merging the PR.