v1.17: [anza migration] ci (backport of #5)

[mergify]

This is an automatic backport of pull request #5 done by Mergify.
Cherry-pick of 16d08a0 has failed:

On branch mergify/bp/v1.17/pr-5
Your branch is up to date with 'origin/v1.17'.

You are currently cherry-picking commit 16d08a02a3.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   .mergify.yml
	deleted:    .travis.yml
	modified:   README.md
	modified:   ci/buildkite-pipeline-in-disk.sh
	modified:   ci/buildkite-pipeline.sh
	modified:   ci/buildkite-solana-private.sh
	modified:   ci/channel-info.sh
	modified:   ci/dependabot-pr.sh
	modified:   ci/test-coverage.sh

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   ci/rust-version.sh

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

---

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[yihau]

@Mergifyio refresh

[mergify]

refresh

✅ Pull request refreshed

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (5b24097) 81.6% compared to head (a4fcb3d) 81.6%.

Additional details and impacted files

@@            Coverage Diff            @@
##            v1.17      #11     +/-   ##
=========================================
- Coverage    81.6%    81.6%   -0.1%     
=========================================
  Files         806      806             
  Lines      219078   219078             
=========================================
- Hits       178874   178851     -23     
- Misses      40204    40227     +23