Improve AAD default configuration condition for Spring Boot 3 branch

[moarychan]

Description

Since there are two ways to configure Spring Security filters for SB2, the default configuration does not consider the custom bean SecurityFilterChain.

azure-sdk-for-java/sdk/spring/spring-cloud-azure-autoconfigure/src/main/java/com/azure/spring/cloud/autoconfigure/implementation/aad/configuration/AadWebApplicationConfiguration.java

Line 43 in 2816f36

@ConditionalOnMissingBean(SecurityFilterChain.class)

Sync using annotation @ConditionalOnDefaultWebSecurity for SB3, refer: #36124

See more from customer report: #32279 (comment)

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[saragluna]

missing changelog