chore: add integrator test CI

[tserg]

What I did

Add integrator CI to check for regressions.

How I did it

How to verify it

Commit message

chore: add era compiler test suite to CI

this commit adds the era compiler test suite to the CI, as they have
good test cases and coverage of our compiler through IR codegen.

this is intended as a diagnostic tool to help catch compiler regressions
and notify us when a change breaks downstream. as explained in the
comments in the workflow file, it is not intended as a CI blocker since
an update in our code could break downstream, and we do not want to wait
on downstream as a blocker.

Description for the changelog

Add integrators CI to check for regressions.

Cute Animal Picture

[codecov-commenter]

Codecov Report

Merging #3394 (5ba5eca) into master (eeccea9) will increase coverage by 0.00%.
The diff coverage is n/a.

❗ Your organization is not using the GitHub App Integration. As a result you may experience degraded service beginning May 15th. Please install the Github App Integration for your organization. Read more.

@@           Coverage Diff           @@
##           master    #3394   +/-   ##
=======================================
  Coverage   88.96%   88.96%           
=======================================
  Files          86       86           
  Lines       10725    10760   +35     
  Branches     2439     2443    +4     
=======================================
+ Hits         9541     9573   +32     
- Misses        785      788    +3     
  Partials      399      399           

see 9 files with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[charles-cooper]

thanks for adding this! will be super helpful with catching regressions