feat(eventstore): accept transaction in push (#8945)

# Which Problems Are Solved

Push is not capable of external transactions.

# How the Problems Are Solved

A new function `PushWithClient` is added to the eventstore framework
which allows to pass a client which can either be a `*sql.Client` or
`*sql.Tx` and is used during push.

# Additional Changes

Added interfaces to database package.

# Additional Context

- part of https://github.com/zitadel/zitadel/issues/8931

---------

Co-authored-by: Livio Spring <livio.a@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

internal/eventstore/eventstore_pusher_test.go

@@ -607,7 +607,7 @@ func TestCRDB_Push_ResourceOwner(t *testing.T) {
 	}
 }
 
-func pushAggregates(pusher eventstore.Pusher, aggregateCommands [][]eventstore.Command) []error {
+func pushAggregates(es *eventstore.Eventstore, aggregateCommands [][]eventstore.Command) []error {
 	wg := sync.WaitGroup{}
 	errs := make([]error, 0)
 	errsMu := sync.Mutex{}
@@ -619,7 +619,7 @@ func pushAggregates(pusher eventstore.Pusher, aggregateCommands [][]eventstore.C
 		go func(events []eventstore.Command) {
 			<-ctx.Done()
 
-			_, err := pusher.Push(context.Background(), events...) //nolint:contextcheck
+			_, err := es.Push(context.Background(), events...) //nolint:contextcheck
 			if err != nil {
 				errsMu.Lock()
 				errs = append(errs, err)