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This will be essentially undoing ~~SERVER-57758~~ – we will need to:

Rename the internalQueryEnableSlotBasedExecutionEngine back to something like internalQueryForceClassicEngine, so that its sense is to disable SBE and force the use of the classic engine. The default value will be false.
Change any existing SBE-on tasks in all Server and Query patch configurations such that they are "SBE-off", and test the classic engine.

depends on

SERVER-60292 [SBE] compareValue should compare canonical types before checking field name equality

SERVER-60325 Stop DocumentSourceCursorTest from calling saveState() twice in a row

is depended on by

SERVER-60106 Remove 'requires_fcv_51' tag from jstests/core/double_decimal_compare.js

SERVER-60194 Remove featureFlagSbePlanCache from fully_disabled_feature_flags.yml

SERVER-60244 Change default value of feature flag to guard $group pushdown logic

related to

SERVER-62457 Lock-free reads causes query subsystem to treat unsharded collection as sharded when collection is dropped and re-created (ABA problem)

(1 related to)