Use GitHub Action to build nebula toolset automatically (#3)
* Use GitHub action to build nebula toolset automatically
* Cleanup ossutil URL
* Refactor
* login firstly
* Fix dockerfile
* Test toolset emulator building
* Fix this dir
* Remove llvm 8.0.0
* Only use centos-7 and debian-8
* Fix debian Dockerfile
* replace gcc 9.3.0 with 9.2.0
* Debug
* Fix data directory exists
* cancel in progress
* cancel in workflow group
* Fix buildx Dockerfile
* Restore
* cancel gcc 10.0.1
* Use self-hosted runners
* split different jobs
* Fix concurrency group
* fix concurrency
