DCR tenant-wise configurations : Get and Patch endpoint implementation

[anjuchamantha]

Purpose

This PR will have the GET and PATHCH implementations for the following DCR configurations in the server configurations api.

1. enableFapiEnforcement - If true, an application which is created through DCR endpoint will be a FAPI compliant application.
2. authenticationRequired - If true, authentication will be required for DCR create endpoint.
3. ssaJwks - This JWKS url will be used to validate the SSA coming in DCR create request.
4. mandateSSA - This will mandate software_statement param in DCR create request. If true, ssaJwks should also be present.

Only the REPLACE operation will be supported and it will override the server-level configuration in deployment.toml.

Note: This PR is dependant on wso2-extensions/identity-inbound-auth-oauth#2344

Git Issue: wso2/product-is#19274

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PR builder started
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Approving the pull request based on the successful pr build https://github.com/wso2/product-is/actions/runs/9074696848