Support for liquibase in executable jars

Create LiquibaseServiceLocatorInitializer to replace the standard
liquibase classpath scanning logic with SpringPackageScanClassResolver
which will work correctly in Spring Boot packaged executable JARs.

Issue: #55580628

spring-boot-dependencies/pom.xml

@@ -166,6 +166,11 @@
 				<artifactId>hsqldb</artifactId>
 				<version>2.2.9</version>
 			</dependency>
+			<dependency>
+				<groupId>org.liquibase</groupId>
+				<artifactId>liquibase-core</artifactId>
+				<version>3.0.2</version>
+			</dependency>
 			<dependency>
 				<groupId>org.projectreactor</groupId>
 				<artifactId>reactor-spring</artifactId>