Check all PUSH opcodes for instr. hashes when viaIR is true

[cgewecke]

See #870 - it looked like instrumentation was getting stripped out by viaIR, but actually some hashes are being displaced onto higher PUSHn opcodes that the collector isn't tracking.

(There's still an unhit line in #870 however ... waiting on answer to this #870 (comment))

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.50%. Comparing base (32029b4) to head (b2e9859).

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #871      +/-   ##
==========================================
+ Coverage   96.47%   96.50%   +0.02%     
==========================================
  Files          19       19              
  Lines        1021     1029       +8     
==========================================
+ Hits          985      993       +8     
  Misses         36       36              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.