[FEATURE REQ] Make azure-spring-boot-starter-active-directory support work together with other oauth2 provider(like google)

[chenrujun]

For example, support config like this:

spring.security.oauth2.client.registration.google.client-id=${CONFIG_GOOGLE_CLIENTID}
spring.security.oauth2.client.registration.google.client-secret=${CONFIG_GOOGLE_CLIENTSECRET}

spring.security.oauth2.client.registration.azure.client-id=${CONFIG_AZURE_CLIENTID}
spring.security.oauth2.client.registration.azure.client-secret=${CONFIG_AZURE_CLIENTSECRET}
azure.activedirectory.tenant-id=${CONFIG_AZURE_TENANTID}
azure.activedirectory.user-group.allowed-groups=${CONFIG_AZURE_ALLOWEDGROUPS}

Then google and azure can work together.

Tasks

• Delete beans which should not configured in azure-spring-cloud-autoconfigure #23942

[chenrujun]

Relation issue: #23710

[chenrujun]

Closing this issue, because we already decide to deprecate azure-spring-boot-starter-active-directory. Use this repo to demonstrate how to use Azure Active Directory in Spring Boot application: https://github.com/Azure-Samples/spring-boot-application-with-azure-active-directory