wip - Use union-k8s-runner in integration tests

[eapolinario]

TL;DR

Use self-hosted runner to run integration tests

Type

• [ ] Bug Fix
• [x] Feature
• [ ] Plugin

Are all requirements met?

• [ ] Code completed
• [ ] Smoke tested
• [ ] Unit tests added
• [ ] Code documentation added
• [ ] Any pending items have an associated Issue

Complete description

We setup a self-hosted runner that has access to bigger boxes. This PR enables that for integration tests.

Tracking Issue

https://github.com/flyteorg/flyte/issues/

Follow-up issue

NA OR https://github.com/flyteorg/flyte/issues/

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (6b29feb) 86.15% compared to head (58d96cf) 37.42%. Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #1839       +/-   ##
===========================================
- Coverage   86.15%   37.42%   -48.74%     
===========================================
  Files         315      173      -142     
  Lines       23200    16745     -6455     
  Branches     3457     2299     -1158     
===========================================
- Hits        19987     6266    -13721     
- Misses       2621    10400     +7779     
+ Partials      592       79      -513     

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