Enable coverage when viaIR compiler flag is true

[cgewecke]

PUBLISHED at the viaIR tag

npm install --save-dev solidity-coverage@viaIR

#853, #848, #790, #715, #417

Uses solidity built-in ignored by the yul optimizer to preserve instrumentation when viaIR is set to true. This should address all the insane optimizer config problems.

Coverage in the plugin's own tests is missing for an edge case where the optimizer has:

• right padded the hash to 32 bytes
• hash has a truncated leading zero
• hash is not duplicate (e.g it wasn't just pushed onto the stack by some other operation)

... we hit the first two conditions in the integration tests but the hash is a duplicate.

TODO

• Fix last remaining test
• e2e test on Zeppelin with viaIR flag set to true and verify coverage is identical
  • timed out in CI ... too big for viaIR?
• e2e on 1 inch (see Setting viaIR to true in solc results in zero coverage #715 (comment))
• Add tests for file-level function declarations (weirdly missing)
  • will add in separate PR, (opening issue)
• Check overrides on solidityConfig ... add test to make sure all cases get discovered
• Publish rc and ask 0% coverage when using hardhat-foundry & foundry.toml is present #853 to test locally
• Check that reports for both test jobs get sent to codecov correctly

[codecov-commenter]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (d3a5b37) 95.92% compared to head (62408ea) 95.77%.

Files	Patch %	Lines
lib/collector.js	88.88%	2 Missing ⚠️
plugins/resources/nomiclabs.utils.js	90.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #854      +/-   ##
==========================================
- Coverage   95.92%   95.77%   -0.16%     
==========================================
  Files          19       19              
  Lines         981     1017      +36     
==========================================
+ Hits          941      974      +33     
- Misses         40       43       +3     

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[cgewecke]

E2E tested against 1inch solidity-utils and got the output below.
Compare with / identical to: https://github.com/1inch/solidity-utils/actions/runs/7756078740/job/21152695486

NB: there was a failing test that looked at gas specific values - to be expected because the instrumentation mechanism changed and there's some consumption variance.