ci: use github actions to publish new tiup releases

[AstroProfundis]

What problem does this PR solve?

Use GitHub Actions to automatically compile and publish new releases of TiUP and its builtin components.

This is also related to #1122

What is changed and how it works?

Added a new workflow .github/workflows/release-tiup.yaml to:

• run on:
  • push to branch ci/gh-* for testing the CI itself
  • push to branch release-* for staging test
  • new release is created for real releasing of new version
• testing and staging builds are labeled as +staging in the version string and build info, and are published to staging server defined by secret TIUP_SERVER_STAGING
• release builds are published to production server defined by secret TIUP_SERVER_PROD

So the releasing procedure in the future would be:

• cherry-pick needed commits to the release-* branch
• push latest commits of release-* to github, and a staging build is triggered at this step
• the staging version will be in the format of vx.y.z-rn-ghash where vx.y.z is the last released version, n is the commit count since last released version, and hash is the hash of current commit (this version would be considered less than the last released version as per SemVer definitions)
• test the staging version to make sure everything is working as expected
• create a new release on github, the tag for new release will also be created, then the release workflow is triggered to publish to production server

Check List

Tests

• Integration test
• Manual test (add detailed scripts or steps below)
  

Release notes:

ci: use github actions to publish new releases

[codecov-io]

Codecov Report

Merging #1158 (1653f84) into master (d5ae317) will decrease coverage by 7.22%.
The diff coverage is 69.23%.

@@            Coverage Diff             @@
##           master    #1158      +/-   ##
==========================================
- Coverage   53.53%   46.30%   -7.23%     
==========================================
  Files         284      284              
  Lines       20302    20318      +16     
==========================================
- Hits        10868     9408    -1460     
- Misses       7756     9438    +1682     
+ Partials     1678     1472     -206     

Flag	Coverage Δ
cluster	32.60% <80.00%> (-12.41%)	⬇️
dm	25.69% <80.00%> (-0.06%)	⬇️
integrate	39.73% <69.23%> (-8.17%)	⬇️
playground	3.12% <83.33%> (+0.18%)	⬆️
tiup	16.54% <68.62%> (+0.18%)	⬆️
unittest	22.82% <8.33%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/repository/mirror.go	39.84% <0.00%> (ø)
cmd/mirror.go	48.91% <64.28%> (+0.39%)	⬆️
cmd/root.go	72.94% <100.00%> (+3.71%)	⬆️
components/playground/main.go	37.75% <100.00%> (+0.31%)	⬆️
pkg/version/version.go	92.30% <100.00%> (+7.69%)	⬆️
pkg/cluster/template/config/config.go	0.00% <0.00%> (-100.00%)	⬇️
pkg/cluster/template/scripts/scripts.go	0.00% <0.00%> (-100.00%)	⬇️
pkg/queue/any_queue.go	0.00% <0.00%> (-83.34%)	⬇️
pkg/cluster/template/scripts/tiflash.go	0.00% <0.00%> (-79.60%)	⬇️
pkg/cluster/task/limits.go	0.00% <0.00%> (-68.75%)	⬇️
... and 65 more

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[lucklove]

/lgtm

[ti-chi-bot]

[REVIEW NOTIFICATION]

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• lucklove

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[lucklove]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 8ca8a42