chore(ci): better nextest config

[skyzh]

Signed-off-by: Alex Chi iskyzh@gmail.com

I hereby agree to the terms of the Singularity Data, Inc. Contributor License Agreement.

What's changed and what's your intention?

Tweak nextest config, so that it can be more useful. Also produce junit file so that it can integrate with Buildkite's test analytics better.

Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests
• All checks passed in ./risedev check (or alias, ./risedev c)

Refer to a related PR or issue link (optional)

[skyzh]

Also enabled Test Analytics of Buildkite, so that we can know more about our unit tests...

https://buildkite.com/organizations/singularity-data/analytics/suites/unit-test

[codecov]

Codecov Report

Merging #3436 (dd3204e) into main (f1c7a2d) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #3436      +/-   ##
==========================================
- Coverage   73.81%   73.81%   -0.01%     
==========================================
  Files         765      765              
  Lines      105357   105357              
==========================================
- Hits        77769    77767       -2     
- Misses      27588    27590       +2     

Flag	Coverage Δ
rust	73.81% <ø> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
src/connector/src/filesystem/file_common.rs	80.35% <0.00%> (-0.45%)	⬇️
src/common/src/types/ordered_float.rs	24.70% <0.00%> (-0.20%)	⬇️

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