ci: reintroduce code coverage reporting with cargo-llvm-cov

[buraksenn]

Which issue does this PR close?

• Closes Coverage jobs are failing on master: Failed to compile tests! Error: sql_integration: linking with cc failed: exit status: 1" #3678.

Rationale for this change

Code coverage has been disabled since #3678. The reason was it failed because of sql_integration test binary. This PR reintroduces it

What changes are included in this PR?

Reintroduce code coverage

Are these changes tested?

I've been successfully make it work in my fork: buraksenn#345

I needed to add CODECOV_TOKEN as a secret variable to the fork.

You can check #23336 (comment) comment of codecov for successful run

Are there any user-facing changes?

no

[github-actions]

Thank you for opening this pull request!

Reviewer note: cargo-semver-checks reported the current version number is not SemVer-compatible with the changes in this pull request (compared against the base branch).

Details

     Cloning apache/main
    Building datafusion v54.0.0 (current)
       Built [ 105.892s] (current)
     Parsing datafusion v54.0.0 (current)
      Parsed [   0.034s] (current)
    Building datafusion v54.0.0 (baseline)
       Built [ 101.893s] (baseline)
     Parsing datafusion v54.0.0 (baseline)
      Parsed [   0.035s] (baseline)
    Checking datafusion v54.0.0 -> v54.0.0 (no change; assume patch)
     Checked [   0.570s] 223 checks: 223 pass, 30 skip
     Summary no semver update required
    Finished [ 211.212s] datafusion
    Building datafusion-ffi v54.0.0 (current)
       Built [  60.510s] (current)
     Parsing datafusion-ffi v54.0.0 (current)
      Parsed [   0.061s] (current)
    Building datafusion-ffi v54.0.0 (baseline)
       Built [  59.860s] (baseline)
     Parsing datafusion-ffi v54.0.0 (baseline)
      Parsed [   0.061s] (baseline)
    Checking datafusion-ffi v54.0.0 -> v54.0.0 (no change; assume patch)
     Checked [   0.244s] 223 checks: 222 pass, 1 fail, 0 warn, 30 skip

--- failure feature_missing: package feature removed or renamed ---

Description:
A feature has been removed from this package's Cargo.toml. This will break downstream crates which enable that feature.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#cargo-feature-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.48.0/src/lints/feature_missing.ron

Failed in:
  feature tarpaulin_include in the package's Cargo.toml

     Summary semver requires new major version: 1 major and 0 minor checks failed
    Finished [ 122.345s] datafusion-ffi

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (main@215ebb8). Learn more about missing BASE report.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #23336   +/-   ##
=======================================
  Coverage        ?   80.50%           
=======================================
  Files           ?     1080           
  Lines           ?   361256           
  Branches        ?   361256           
=======================================
  Hits            ?   290837           
  Misses          ?    53122           
  Partials        ?    17297           

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[buraksenn]

As expected it could not compare since there is no code coverage uploaded for main branch. After this PR merges it will be ready

[Jefffrey]

👀