"CREATE TABLE IF NOT EXISTS" results in a false-positive error if table already exists

Take a script like the auto-generated migration history table creation by Entity Framework:

```sql
CREATE TABLE IF NOT EXISTS "__EFMigrationsHistory" (
"MigrationId" character varying(150) NOT NULL,
"ProductVersion" character varying(32) NOT NULL,
CONSTRAINT "PK___EFMigrationsHistory" PRIMARY KEY ("MigrationId")
);
```

This results in a false error if the table actually already exists:

```
psql:/home/runner/work/somethingsomething.sql:5: NOTICE: relation "__EFMigrationsHistory" already exists, skipping
[...]
Error: Error occurred while running action:
Error: error in file: /home/runner/work/somethingsomething.sql
psql:/home/runner/work/somethingsomething.sql:5: NOTICE: relation "__EFMigrationsHistory" already exists, skipping
```

Which subsequently and wrongly fails the build.

Der Bericht nennt keine Quelldatei und keinen Einstiegspunkt für Tests. Reproduziere das Entity Framework-Migrationsskript mit einer vorhandenen Tabelle __EFMigrationsHistory, verfolge anschließend, wie die PostgreSQL-Aktion die NOTICE behandelt, und überprüfe, dass diese erwartete Notice den Build nicht mehr fehlschlagen lässt.

Vom Indexierungsmodell aus dem Issue-Text verfasst.