Add cmake module for building dependencies at configuration time

[sfod]

Issue #, if available:

This functionality is needed to fix s2n-tls misconfiguration in aws-crt-* projects. See awslabs/aws-crt-cpp#648

Description of changes:

This cmake module implements a new function, prebuild_dependency, which can build a dependency at configuration time.

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

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.82%. Comparing base (2add521) to head (d6004d3).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1144   +/-   ##
=======================================
  Coverage   83.82%   83.82%           
=======================================
  Files          57       57           
  Lines        5991     5991           
=======================================
  Hits         5022     5022           
  Misses        969      969           

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