* Incompatible with previous releases when use H2/MySQL/TiDB storage options, due to support multiple alarm rules triggered for one entity.
* Chore: adapt `create_source_release.sh` to make it runnable on Linux.
* Add `package` to `.proto` files, prevent polluting top-level namespace in some languages; The OAP server supports previous agent releases, whereas the previous OAP server (<=8.3.0)won'trecognizeneweragentssincethisversion(>= 8.4.0).
* Add ElasticSearch 7.10 to test matrix and verify it works.
#### Java Agent
* The operation name of quartz-scheduler plugin, has been changed as the `quartz-scheduler/${className}` format.