[pick-8.1] region_request: ignore resource group errors that not relative storage layer (#1354)

[nolouch]

ref https://github.com/tikv/client-go/issues/1322

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Timeline:

• 2024-09-13 08:17:00.994591937 +0000 UTC m=+603490.735015877: :ballot_box_with_check: agreed by cfzjywxk.
• 2024-09-13 09:01:12.102783339 +0000 UTC m=+606141.843207278: :ballot_box_with_check: agreed by you06.