Attempt to fix bitcoin reorg flap test

[obycode]

Forcefully kill the bitcoind in case it fails to stop.

[obycode]

It looks like some change in between the original fix to this problem and the current next has caused the test to fail, so that needs to get fixed. I'll look into it tomorrow.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 40 lines in your changes are missing coverage. Please review.

Project coverage is 77.34%. Comparing base (9708368) to head (a4b5295).
Report is 3 commits behind head on next.

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #4601      +/-   ##
==========================================
- Coverage   83.39%   77.34%   -6.05%     
==========================================
  Files         470      470              
  Lines      332704   332804     +100     
  Branches      317      317              
==========================================
- Hits       277442   257413   -20029     
- Misses      55254    75383   +20129     
  Partials        8        8              

Files	Coverage Δ
testnet/stacks-node/src/tests/neon_integrations.rs	61.38% <0.00%> (-12.07%)	⬇️

... and 193 files with indirect coverage changes

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[wileyj]

this PR still needs more work. brice and I have discussed some alternatives but it may not be ready for 2.5.

i would recommend we move this to draft/backlog for now