fix(actions): preserve order of execution (#8895)

# Which Problems Are Solved

The order of actions on a trigger was not respected on the execution and
not correctly returned when retrieving the flow, for example in Console.
The supposed correction of the order (e.g. in the UI) would then return
a "no changes" error since the order was already as desired.

# How the Problems Are Solved

- Correctly order the actions of a trigger based on their configuration
(`trigger_sequence`).

# Additional Changes

- replaced a `reflect.DeepEqual` with `slices.Equal` for checking the
action list

# Additional Context

- reported by a customer
- requires backports

internal/query/action_flow.go

@@ -168,6 +168,7 @@ func prepareTriggerActionsQuery(ctx context.Context, db prepareDatabase) (sq.Sel
 		).
 			From(flowsTriggersTable.name).
 			LeftJoin(join(ActionColumnID, FlowsTriggersColumnActionID) + db.Timetravel(call.Took(ctx))).
+			OrderBy(FlowsTriggersColumnTriggerSequence.identifier()).
 			PlaceholderFormat(sq.Dollar),
 		func(rows *sql.Rows) ([]*Action, error) {
 			actions := make([]*Action, 0)
@@ -220,6 +221,7 @@ func prepareFlowQuery(ctx context.Context, db prepareDatabase, flowType domain.F
 		).
 			From(flowsTriggersTable.name).
 			LeftJoin(join(ActionColumnID, FlowsTriggersColumnActionID) + db.Timetravel(call.Took(ctx))).
+			OrderBy(FlowsTriggersColumnTriggerSequence.identifier()).
 			PlaceholderFormat(sq.Dollar),
 		func(rows *sql.Rows) (*Flow, error) {
 			flow := &Flow{