Disallow CDI beans impacting metadata creation

Because:

1. We currently disallow this for identifier generators only
   through a custom initializer for the identifier generator
   factory service, but that service is disappearing in Hibernate
   ORM 7.0.0.Beta1, leaving us only the setting `hibernate.cdi.extensions`.
   to disallow CDI for identifier generators -- and anything else
   that impacts metadata creation.
2. This is needed for #40897,
   which will move more of metadata creation to build time -- where CDI
   is just not available.
3. Implementations of affected components needing access to CDI at
   runtime (so not during metadata creation) can still do so by
   calling `Arc.container()` to retrieve the relevant beans.

extensions/hibernate-orm/runtime/src/main/java/io/quarkus/hibernate/orm/runtime/FastBootHibernatePersistenceProvider.java

@@ -235,6 +235,14 @@ private RuntimeSettings buildRuntimeSettings(String persistenceUnitName, Recorde
  // Allow detection of driver/database capabilities on runtime init (was disabled during static init)
  runtimeSettingsBuilder.put("hibernate.boot.allow_jdbc_metadata_access", "true");
 
+ // Allow CDI on runtime init (was disabled during static init)
+ // NOTE: As of Hibernate ORM 7.0.0.Beta1, this does not seem to change anything,
+ // as all Hibernate-specific "extensions" relying on CDI seem to happen during metadata
+ // creation, so much before runtime init.
+ // We're setting this out of an abundance of caution,
+ // in case a "runtime" Hibernate-specific "extension" is added one day.
+ runtimeSettingsBuilder.put(AvailableSettings.ALLOW_EXTENSIONS_IN_CDI, "true");
+
  if (!persistenceUnitConfig.unsupportedProperties().isEmpty()) {
  log.warnf("Persistence-unit [%s] sets unsupported properties."
  + " These properties may not work correctly, and even if they do,"

extensions/hibernate-orm/runtime/src/main/java/io/quarkus/hibernate/orm/runtime/boot/FastBootMetadataBuilder.java

@@ -271,6 +271,9 @@ private MergedSettings mergeSettings(QuarkusPersistenceUnitDefinition puDefiniti
 
  cfg.put("hibernate.boot.allow_jdbc_metadata_access", "false");
 
+ // Disallow CDI during metadata building in anticipation for https://github.com/quarkusio/quarkus/issues/40897
+ cfg.put(AvailableSettings.ALLOW_EXTENSIONS_IN_CDI, "false");
+
  //This shouldn't be encouraged, but sometimes it's really useful - and it used to be the default
  //in Hibernate ORM before the JPA spec would require to change this.
  //At this time of transitioning we'll only expose it as a global system property, so to allow usage

extensions/hibernate-orm/runtime/src/main/java/io/quarkus/hibernate/orm/runtime/service/StandardHibernateORMInitiatorListProvider.java

@@ -80,9 +80,7 @@ public List<StandardServiceInitiator<?>> initialInitiatorList() {
  serviceInitiators.add(BatchBuilderInitiator.INSTANCE);
  serviceInitiators.add(JdbcServicesInitiator.INSTANCE);
  serviceInitiators.add(RefCursorSupportInitiator.INSTANCE);
-
- // Custom one!
- serviceInitiators.add(new QuarkusIdentifierGeneratorFactoryInitiator());
+ serviceInitiators.add(StandardIdentifierGeneratorFactoryInitiator.INSTANCE);
 
  serviceInitiators.add(QuarkusJtaPlatformInitiator.INSTANCE);
 

extensions/hibernate-reactive/runtime/src/main/java/io/quarkus/hibernate/reactive/runtime/boot/registry/ReactiveHibernateInitiatorListProvider.java

@@ -14,6 +14,7 @@
 import org.hibernate.engine.jdbc.internal.JdbcServicesInitiator;
 import org.hibernate.engine.jdbc.internal.SqlStatementLoggerInitiator;
 import org.hibernate.event.internal.EntityCopyObserverFactoryInitiator;
+import org.hibernate.id.factory.internal.StandardIdentifierGeneratorFactoryInitiator;
 import org.hibernate.persister.internal.PersisterFactoryInitiator;
 import org.hibernate.property.access.internal.PropertyAccessStrategyResolverInitiator;
 import org.hibernate.reactive.id.factory.spi.ReactiveIdentifierGeneratorFactoryInitiator;
@@ -33,7 +34,6 @@
 import io.quarkus.hibernate.orm.runtime.customized.BootstrapOnlyProxyFactoryFactoryInitiator;
 import io.quarkus.hibernate.orm.runtime.customized.QuarkusJndiServiceInitiator;
 import io.quarkus.hibernate.orm.runtime.service.InitialInitiatorListProvider;
-import io.quarkus.hibernate.orm.runtime.service.QuarkusIdentifierGeneratorFactoryInitiator;
 import io.quarkus.hibernate.orm.runtime.service.QuarkusImportSqlCommandExtractorInitiator;
 import io.quarkus.hibernate.orm.runtime.service.QuarkusRegionFactoryInitiator;
 import io.quarkus.hibernate.orm.runtime.service.QuarkusStaticInitDialectFactoryInitiator;
@@ -95,9 +95,7 @@ public List<StandardServiceInitiator<?>> initialInitiatorList() {
  serviceInitiators.add(BatchBuilderInitiator.INSTANCE);
  serviceInitiators.add(JdbcServicesInitiator.INSTANCE);
  serviceInitiators.add(RefCursorSupportInitiator.INSTANCE);
-
- // Custom one!
- serviceInitiators.add(new QuarkusIdentifierGeneratorFactoryInitiator());
+ serviceInitiators.add(StandardIdentifierGeneratorFactoryInitiator.INSTANCE);
 
  // Custom for Hibernate Reactive:
  serviceInitiators.add(NoJtaPlatformInitiator.INSTANCE);