[TEST] Change codecov ignore path

[Ornias1993]

Test using relative pathing for codecov yml.
Personal experiment based on request by coedcov support
If moving works, maybe relative pathing too.

Both PR's added at once, because I would've the results of both by tomorrow morning (my timezone)

TBD:

Motivation and Context

Description

How Has This Been Tested?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Performance enhancement (non-breaking change which improves efficiency)
• Code cleanup (non-breaking change which makes code smaller or more readable)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (a change to man pages or other documentation)

Checklist:

• My code follows the ZFS on Linux code style requirements.
• I have updated the documentation accordingly.
• I have read the contributing document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• All commit messages are properly formatted and contain Signed-off-by.

[codecov]

Codecov Report

Merging #9695 into master will increase coverage by <1%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           master    #9695    +/-   ##
========================================
+ Coverage      79%      79%   +<1%     
========================================
  Files         418      418            
  Lines      123572   123572            
========================================
+ Hits        98121    98178    +57     
+ Misses      25451    25394    -57

Flag	Coverage Δ
#kernel	80% <ø> (ø)	⬇️
#user	67% <ø> (ø)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 0dcef9b...d59643e. Read the comment docs.

[Ornias1993]

I'll close this as "not working" and forward it to the guys from codecov.