chore: remove --openssl-legacy-provider option

[pichlermarc]

Saw this earlier when working on #5010.
We needed this when we were still using webpack 4, but we've fully migrated to webpack 5, so we can drop it 🙂

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.92%. Comparing base (f8ab559) to head (081e9e1).
Report is 11 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5012      +/-   ##
==========================================
+ Coverage   93.39%   93.92%   +0.52%     
==========================================
  Files          46      310     +264     
  Lines         712     8135    +7423     
  Branches      120     1632    +1512     
==========================================
+ Hits          665     7641    +6976     
- Misses         47      494     +447     

see 266 files with indirect coverage changes

[legendecas]

thanks for cleaning this up!