WT-6729 Quiesce eviction prior running rollback to stable's active transaction check

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• Closed

WT-7863 RTS illegal with active transactions

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• Closed

WT-7909 Create a new method to check for running user transactions before starting rollback-to-stable operation

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• Closed

WT-7975 [4.2.14] fix "rollback_to_stable illegal with active transactions" errors

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• Backlog

WT-7273 test_rollback_to_stable14: Fix invalid argument failure in __wt_txn_context_check

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• Closed