Further troubleshoot current codecov CI issues

[scorbajio]

This change is a followup on #3376 and looks into remaining codecov issues:

• The master branch isn't having coverage pushed/calculated/visualized, so I'll see if this is just a misconfig or something
• Some packages (devp2p, wallet, genesis, client) aren't having their coverage files uploaded? Or, atleast they're not showing up on codecov at the moment, so I'll triage and followup here.
• As mentions by @jochem-brouwer, most of the coverage diffs seem to not be calculates/reported ( Troubleshoot codecov failures to upload coverage data #3376 (comment)).
• rlp and ethash packages are uploading coverage reports, but their reports are erroring out as unusable. I remember working on this before and opening a codecov ticket on it too (in the codecov official repo) that didn't get much activity, but will look into and followup on this on as well.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 27.46%. Comparing base (4470cc3) to head (e7402fb).
Report is 102 commits behind head on master.

Additional details and impacted files

Flag	Coverage Δ
block	67.57% <ø> (-5.89%)	⬇️
blockchain	83.49% <ø> (?)
client	0.00% <ø> (ø)
common	89.85% <ø> (?)
devp2p	0.00% <ø> (?)
evm	65.18% <ø> (?)
genesis	0.00% <ø> (?)
mpt	52.09% <ø> (?)
statemanager	67.41% <ø> (?)
tx	76.70% <ø> (-1.08%)	⬇️
util	71.23% <ø> (?)
vm	58.28% <ø> (?)
wallet	0.00% <ø> (ø)

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

[scorbajio]

I just checked all of the packages (devp2p, wallet, genesis, client) that are showing no coverage in codecov, and it seems like their lcov files are being uploaded, but since their coverage difference is being calculated from the lcov files uploaded from the last commit on master that had any uploads at all, the diffs aren't going to be calculated as expected. It may help to resolve the issue that's keeping master from having it's coverage updated in codecov to see if this fixes things here too.

[scorbajio]

In order to update codecov coverage, we'd need to merge this in order for coverage to be calculated and uploaded for the master branch. We may discover that this also solved other issues resulting from missing coverage from the master branch (which is used as the base for calculating coverage differences between commits), if not, I'll open up a different PR to address them.

[holgerd77]

🙏

Cool! Can you maybe extract the TODO list from above in a separate issue, at least if you plan to do this several iterations (likely, right?). Otherwise this will create this weird referencing of this sub-PR, that will likely get confusing at some point.

But - yeah - totally like respectively feels good that we get a coverage re-integration! 😆 🤩