Setup X509 CodeBuild Project for Limbo Report Generation

[skmcgrail]

Description of changes:

Adds a new AWS CodeBuild Project which will build and run the x509-limbo project and produce a set of reports and alerts for pull requests and branch pushes.

Testing:

• Validated in my personal AWS account by deploying the CDK stack changes and testing using my fork. Reach out if you want to walk-through of what the reports look like.

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 78.96%. Comparing base (cc9c9f0) to head (710b74e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2171      +/-   ##
==========================================
- Coverage   78.97%   78.96%   -0.02%     
==========================================
  Files         611      611              
  Lines      105552   105551       -1     
  Branches    14950    14948       -2     
==========================================
- Hits        83361    83349      -12     
- Misses      21538    21550      +12     
+ Partials      653      652       -1     

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