Add affirmation overrides config option and add default xenon ones ne…

[jferrant]

Closes: #4493

[codecov]

Codecov Report

Attention: Patch coverage is 94.91525% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 82.05%. Comparing base (284945b) to head (7f399b6).

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #4560      +/-   ##
==========================================
- Coverage   83.26%   82.05%   -1.21%     
==========================================
  Files         456      456              
  Lines      330480   330593     +113     
  Branches      323      323              
==========================================
- Hits       275187   271281    -3906     
- Misses      55285    59304    +4019     
  Partials        8        8              

Files	Coverage Δ
testnet/stacks-node/src/config.rs	66.02% <100.00%> (+2.02%)	⬆️
stackslib/src/burnchains/db.rs	80.50% <0.00%> (-0.16%)	⬇️
testnet/stacks-node/src/run_loop/neon.rs	82.78% <66.66%> (-1.39%)	⬇️

... and 54 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 284945b...7f399b6. Read the comment docs.

[jcnelson]

LGTM; just one minor nit

[wileyj]

shipit!