Improve CI coverage reporting

[gnunicorn]

• split coverage in multiple sections: default for crates, bindings and labs as informational (not mandataory)
• disable patch-level analytics - we don't care that n% of lines in that PR were hit, only project wide statistics

[poljar]

Something needs to be done for the matrix-sdk-crypto-ffi crate as well, either move it into the bindings directory or add special handling.

The matrix-sdk-indexeddb crate should also be added to the tarpaulin.toml exclude section.

[codecov]

Codecov Report

Merging #700 (dd1f817) into main (d6c6211) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #700   +/-   ##
=======================================
  Coverage   72.63%   72.63%           
=======================================
  Files         107      107           
  Lines       15932    15932           
=======================================
  Hits        11572    11572           
  Misses       4360     4360           

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[gnunicorn]

unfortunately, I can not add ignores in the path, so we have to spell out each folder... need to remember that if we added more crates to crates/ ...

I've also outcommented "wasm" with reference to the pending issue...