Revert "[Core] Put pg state to kv store when pg rescheduling (#34467)"

[rkooo567]

This reverts commit af018f6.

Why are these changes needed?

This is the only pg change we made recently, so I assume it could be related. I am not 100% sure though. Let's revert and see how it goes.

cc @larrylian

Related issue number

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[rkooo567]

cc @larrylian I will monitor the pg_3 for a while and lyk. Please recreate a revert-revert PR!

[larrylian]

@rkooo567 Okay. I will also look into whether this PR is causing the issue. If it is, I will submit a fix PR at the same time.

[larrylian]

@rkooo567 resubmit PR: #34948

[larrylian]

@rkooo567 I checked the current situation of test_placement_group_3. There will still be flakey use cases. I think the reason for the error should be "bind: Address already in use". This should have nothing to do with my modification above.

[rkooo567]

yeah that sounds reasonable. Let me merge this PR again.