chore(ci): switch to cargo-tarpaulin for measuring code coverage

[orhun]

Description

Update CI workflow for switching to cargo-tarpaulin

Motivation and Context

CI sometimes fails due to grcov.

How Has This Been Tested?

-

Screenshots / Output (if appropriate):

-

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (no code change)
• Refactor (refactoring production code)
• Other

Checklist:

• My code follows the code style of this project.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

Base: 45.59% // Head: 64.06% // Increases project coverage by +18.47% 🎉

Coverage data is based on head (bf9eeaa) compared to base (078bdc3).
Patch has no changes to coverable lines.

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #110       +/-   ##
===========================================
+ Coverage   45.59%   64.06%   +18.47%     
===========================================
  Files          15       14        -1     
  Lines        1099      790      -309     
  Branches      283        0      -283     
===========================================
+ Hits          501      506        +5     
+ Misses        442      284      -158     
+ Partials      156        0      -156     

Flag	Coverage Δ
unit-tests	64.06% <ø> (?)

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

Impacted Files	Coverage Δ
git-cliff-core/src/release.rs	0.00% <0.00%> (-10.00%)	⬇️
git-cliff/src/bin/completions.rs	0.00% <0.00%> (-10.00%)	⬇️
git-cliff/src/bin/mangen.rs	0.00% <0.00%> (-8.33%)	⬇️
git-cliff/src/main.rs	0.00% <0.00%> (-6.66%)	⬇️
git-cliff/src/changelog.rs	71.17% <0.00%> (-6.10%)	⬇️
git-cliff/src/lib.rs	0.00% <0.00%> (-0.61%)	⬇️
git-cliff-core/src/embed.rs	0.00% <0.00%> (ø)
git-cliff/src/args.rs
git-cliff-core/src/lib.rs
git-cliff-core/tests/integration_test.rs	100.00% <0.00%> (ø)
... and 6 more

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