* Rename ALarmSupported to WithMetadata

* Finish the base of exporter.

* Fix class comment.

* Make scope meta configurable.

* Fix test cases in ci.

* Change step 1

* Refactor step 2

* Other compile issue done. Prepare the generator changes.

* Revert some wrong changes to Istio receiver.

* Step 3, make compile pass.

* Try to make CI passed.

* Add a check.

* Fix generated code style

* Provide new and extendable dispatcher generator tool

* Fix startup.

* Can't guarantee the dispatchers are always existing. Put explicit comments at there to avoid confusion, since this is different with old version.

* Fix a H2 query for endpoint search.

* Fix a wrong mysql alarm query.

* Provide new document and `generate-tool-grammer` module.

* Add missing last section of document.

* Fix typo

* Relocate the @ScopeDeclaration annotation, make it more sense. Also remove the useless @SourceType annotation. And adjust document for these changes

* ScopeDeclaration can be used once for each class only, now.

* Fix the alarm being started too many times.

* Remove unnecessary interface.

* Fix wrong status changed

* Support alarm in service instance and endpoint.

* Fix alarm default settings and document.

* Fix wrong default setting

* Make service instance and endpoint scopes available in alarm core.

* Fix alarm bug.

* OAP server testing module.

#1930

* #Missing delete code.

* Support new indicator core.

* Block 2 unaccessible methods.

* Add service call as manual indicator and refactor the core DIspatcherManager