Problem: go1.20 is not used

[yihuang]

Closes: #844
Solution:

• use go 1.20
• update nixpkgs to master, and remove custom rocksdb expression in favor of builtin one.
• setup go coverage support for integration test
• don't upload the coverage reports yet due to a bug

👮🏻👮🏻👮🏻 !!!! REFERENCE THE PROBLEM YOUR ARE SOLVING IN THE PR TITLE AND DESCRIBE YOUR SOLUTION HERE !!!! DO NOT FORGET !!!! 👮🏻👮🏻👮🏻

PR Checklist:

• Have you read the CONTRIBUTING.md?
• Does your PR follow the C4 patch requirements?
• Have you rebased your work on top of the latest master?
• Have you checked your code compiles? (make)
• Have you included tests for any non-trivial functionality?
• Have you checked your code passes the unit tests? (make test)
• Have you checked your code formatting is correct? (go fmt)
• Have you checked your basic code style is fine? (golangci-lint run)
• If you added any dependencies, have you checked they do not contain any known vulnerabilities? (go list -json -m all | nancy sleuth)
• If your changes affect the client infrastructure, have you run the integration test?
• If your changes affect public APIs, does your PR follow the C4 evolution of public contracts?
• If your code changes public APIs, have you incremented the crate version numbers and documented your changes in the CHANGELOG.md?
• If you are contributing for the first time, please read the agreement in CONTRIBUTING.md now and add a comment to this pull request stating that your PR is in accordance with the Developer's Certificate of Origin.

Thank you for your code, it's appreciated! :)

[yihuang]

$ go tool covdata textfmt -i=integration_tests/coverage -o profile.txt
error: error: reading counter data file integration_tests/coverage/covcounters.627546bfc793cab3f06764545dba1bd1.91113.1675846217322297000: error: short read on string table

I can reproduce this issue, maybe something wrong with this new golang feature.

[mmsqe]

go tool covdata textfmt -i=integration_tests/coverage -o profile.txt

I thought it error on report on 1st time, since profile.txt is normal when I tried

integration_tests/coverage/
profile.txt

[yihuang]

I guess we should merge the nixpkgs and golang version upgrade first, then debugging the coverage thing, otherwise, the integration test workflow takes 2hours each time.

[JayT106]

LGTM, could you describe the purpose we change the nixpkgs from release version to the master? Thanks.

[yihuang]

LGTM, could you describe the purpose we change the nixpkgs from release version to the master? Thanks.

just for the go 1.20 which is only in the master branch, the coverage feature is only introduced in latest golang 1.20

[yihuang]

golang/go#58411
it's indeed a bug in golang runtime, so let's update golang version only, without using the -cover for now.