sql: job SessionData OptimizerFKCascadesLimit not defaulting to optDr…

…ivenFKCascadesClusterLimit

Fixes #101265

`SessionData` available to in the job context has a 0-value
`OptimizerFKCascadesLimit`.

This causes DELETE queries run by the job with an inbound on-delete-cascade FK
to fail with an error `cascades limit (0) reached`.

This change fixes this by populating OptimizerFKCascadesLimit in
`sql.NewFakeSessionData`.

Release note: None

pkg/sql/schema_changer.go

@@ -2543,7 +2543,8 @@ func NewFakeSessionData(sv *settings.Values, opName string) *sessiondata.Session
 			Internal:      true,
 		},
 		LocalOnlySessionData: sessiondatapb.LocalOnlySessionData{
-			DistSQLMode: sessiondatapb.DistSQLExecMode(DistSQLClusterExecMode.Get(sv)),
+			DistSQLMode:              sessiondatapb.DistSQLExecMode(DistSQLClusterExecMode.Get(sv)),
+			OptimizerFKCascadesLimit: optDrivenFKCascadesClusterLimit.Get(sv),
 		},
 		SearchPath:    sessiondata.DefaultSearchPathForUser(username.NodeUserName()),
 		SequenceState: sessiondata.NewSequenceState(),