Adjust dependency management for Dependabot

* Add `com.github.spotbugs` plugin to avoid warnings about missed nullability annotations
* Make `TimeSupplierConfiguration` as an auto-configuration
* Add `io.debezium:debezium-bom` as the first one to let others override its deps versions
* Move `org.springframework.boot:spring-boot-dependencies` after `io.awspring.cloud:spring-cloud-aws-dependencies`
to override its deps versions (e.g. `jakarta.mail` `1.0.0` > `2.0.2`)

function/twitter-function/build.gradle

@@ -1,6 +1,5 @@
 dependencies {
     api project(':twitter-common')
 
-    testImplementation "org.mock-server:mockserver-netty:$mockserverVersion"
-    testImplementation "org.mock-server:mockserver-client-java:$mockserverVersion"
+    testImplementation mockserverNetty
 }