[compiler][ez] Fix main (bad rebase / amend for facebook#32095) (facebook#32160)

See title: this fixes test cases broken by
facebook#32095 adding instead of moving
new test fixtures

Author: mofeiZ

compiler/packages/babel-plugin-react-compiler/src/HIR/ObjectShape.ts

@@ -569,7 +569,7 @@ addObject(BUILTIN_SHAPES, BuiltInMixedReadonlyId, [
     'flatMap',
     addFunction(BUILTIN_SHAPES, [], {
       positionalParams: [],
-      restParam: Effect.Read,
+      restParam: Effect.ConditionallyMutate,
       returnType: {kind: 'Object', shapeId: BuiltInArrayId},
       calleeEffect: Effect.ConditionallyMutate,
       returnValueKind: ValueKind.Mutable,
@@ -580,7 +580,7 @@ addObject(BUILTIN_SHAPES, BuiltInMixedReadonlyId, [
     'filter',
     addFunction(BUILTIN_SHAPES, [], {
       positionalParams: [],
-      restParam: Effect.Read,
+      restParam: Effect.ConditionallyMutate,
       returnType: {kind: 'Object', shapeId: BuiltInArrayId},
       calleeEffect: Effect.ConditionallyMutate,
       returnValueKind: ValueKind.Mutable,