Prepare AWS-LC v1.48.5

[justsmth]

Description of changes:

Prepare AWS-LC v1.48.5.

What's Changed

• GitHub CI job to verify tags are on expected branches by @justsmth in GitHub CI job to verify tags are on expected branches #2170
• ci: Nix flake and devShell by @dougch in ci: Nix flake and devShell #2189
• s2n-bignum build should use boringssl_prefix_symbols_asm.h by @justsmth in s2n-bignum build should use boringssl_prefix_symbols_asm.h #2265

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.04%. Comparing base (804a11b) to head (85e7cc5).
⚠️ Report is 620 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2274   +/-   ##
=======================================
  Coverage   79.03%   79.04%           
=======================================
  Files         612      612           
  Lines      106630   106630           
  Branches    15098    15099    +1     
=======================================
+ Hits        84279    84281    +2     
+ Misses      21697    21695    -2     
  Partials      654      654           

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