Add transparant and explicit proxy terraform scripts

[abyrne55]

What does this PR do?

This PR supersedes #267 and implements OSD-23854, which calls for the code from abyrne55/transparent-proxy-setup to be moved into this repo's "example" code directory. The two directories created by this PR (vpc-proxied-explicit and vpc-proxied-transparent) contain Terraform scripts for quickly deploying AWS VPCs that explicitly- or transparently-proxy their traffic through a generated proxy server.

Checklist

• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• [ ] I have made corresponding change to the default configuration files
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have tested the functionality against gcp / aws, it doesn't cause any regression
• I have added execution results to the PR's readme

How to test this PR locally

Please read through and run through the two READMEs included in this PR

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 25.91%. Comparing base (060ba01) to head (617bbf4).
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #269      +/-   ##
==========================================
+ Coverage   25.27%   25.91%   +0.63%     
==========================================
  Files          24       25       +1     
  Lines        1812     1837      +25     
==========================================
+ Hits          458      476      +18     
- Misses       1329     1333       +4     
- Partials       25       28       +3     

see 14 files with indirect coverage changes

[joshbranham]

This looks good to me. I ran a test locally by launching both types of proxy and confirming the proxy was up and running via the web UI. I did not do any further testing after that.

Only other comment I have is we could probably share a lot of this Terraform code in a common module since they are similar stacks, but as far as an example goes this seems fine to me!

/lgtm

[abyrne55]

/lgtm
/approve

[openshift-ci]

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/lgtm
/approve

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[openshift-ci]

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[openshift-ci]

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[joshbranham]

/lgtm