remove stale integration tests that are not used

[alexpyattaev]

Problem

• We have a bunch of integration tests relying on GCE scripts that have not been used /maintained in a while.
• Keeping them in the repo achieves nothing

Summary of Changes

• Axe legacy files

To consider: we probably need a reasonable way to achieve similar results for alpenglow without reinventing the wheel and with far fewer lines of bash.

[t-nelson]

@yihau are these the ones that we pulled out of pr ci to nightly ci, then no one ever looked at them again, so we stopped running them?

[yihau]

yeah, I think so. the following nightly runs have been stopped:

• system-test/performance-testcases/gce-cpu-only-perf-5-node.yml
• system-test/stability-testcases/gce-perf-stability-5-node-single-region.yml
• system-test/partition-testcases/gce-5-node-3-partition.yml (run with system-test/netem-configs/partial-loss-three-partitions)
• system-test/partition-testcases/gce-5-node-single-region-2-partitions.yml (run with system-test/netem-configs/complete-loss-two-partitions)
• system-test/partition-testcases/gce-partition-once-then-stabilize.yml (run with system-test/netem-configs/partial-loss-three-partitions)

I couldn’t find the older records since they were in the labs' buildkite project. but iirc, when we were still labs, we also ran some of the other uncover files

[alexpyattaev]

but iirc, when we were still labs, we also ran some of the other uncover files

What are the uncover files?

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.0%. Comparing base (dda8b79) to head (844e8ba).
⚠️ Report is 2337 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##           master    #7166     +/-   ##
=========================================
- Coverage    83.0%    83.0%   -0.1%     
=========================================
  Files         812      812             
  Lines      356963   356963             
=========================================
- Hits       296593   296588      -5     
- Misses      60370    60375      +5     

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[yihau]

oh, I mean the files that I didn't mention earlier. like system-test/netem-configs/complete-loss-four-partitions, system-test/partition-testcases/gce-partition-recovery.yml...

[alexpyattaev]

So, let us axe this then? We can always resurrect it later if needed.

[alexpyattaev]

@t-nelson had to rebase due to conflicts in Cargo.toml files that were to be removed by this PR.