Add regression test for #15220

[serathius]

What would you like to be added?

A command like make test-robustness-issue14685 for #15220

Example #18099

How to start:

• Follow https://github.com/etcd-io/etcd/tree/main/tests/robustness
• Try command like make test-robustness-issue14370 to see how it should work

Requirement:

• Add command make test-robustness-issue15220
• The command should pick an old etcd version that is affected (read the issue Requested watcher progress notifications are not synchronised with stream #15220). Patch might be needed for repro (ask @serathius if needed)
• Running command should reproduce the failure within ~100 runs
• Update https://github.com/etcd-io/etcd/tree/main/tests/robustness#robustness-track-record with the command

Why is this needed?

Ensure we maintain reprodudability of historical issues.

[serathius]

/assign samuelbartels20

[k8s-ci-robot]

@serathius: GitHub didn't allow me to assign the following users: samuelbartels20.

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In response to this:

/assign samuelbartels20

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[samuelbartels20]

@serathius Please assign me to this issue