[java] Replace Maven dependency references with artifact() for org.jspecify.jspecify (#16635)

* Replace Maven dependency references with artifact() for org.jspecify:jspecify in multiple BUILD.bazel files

Update BUILD.bazel to load artifact() alongside java_export

Update BUILD.bazel to load artifact() for java_library and java_export

* Refactor BUILD.bazel files to consolidate artifact loading in multiple modules

* applied formatting for build files

* applied formatting for build files for building files leftover