Remove integration of liquibase-hibernate5 in the database-migration plugin

[rainboyan]

Currently, the latest version of liquibase-core is 4.33.0, the latest version of liquibase-hibernate5 is 4.27.0, and Spring Boot 3.5.x only upgrades to 4.31.1.
To more conveniently synchronize with Spring Boot and integrate liquibase,
we have decided to no longer use liquibase-hibernate5 and will no longer provide related commands, such as dbmGenerateGormChangelog, dbmGormDiff, and schemaExport.

• Remove dependence on liquibase-hibernate5 in build.gradle
• Remove GORM related commands: DbmGenerateGormChangelogCommand DbmGormDiffCommand SchemaExportCommand
• Remove GormDatabase
• Remove liquibase-hibernate in gradle/libs.versions.toml
• Remove DbmGenerateGormChangelogCommandSpec DbmGormDiffCommandSpec