Integration tests using postgresql fail to compile natively with Java 17
### Describe the bug

Native compilation of integration tests using postgresql fails with GraalVM CE 21.3 Java17 (`quay.io/quarkus/ubi-quarkus-native-image:21.3-java17`)

Namely the following tests fail to build:
* main
* jpa-db2
* jpa-mysql
* jpa-postgresql
* jpa-postgresql-withxml
* hibernate-orm-tenancy
* vault-app
* smallrye-opentracing

See https://github.com/graalvm/mandrel/actions/runs/1445890803

### Expected behavior

Tests should build and run.

### Actual behavior

Tests fail to build with:
```
Error: com.oracle.graal.pointsto.constraints.UnresolvedElementException: Discovered unresolved type during parsing: sun.security.krb5.Credentials. To diagnose the issue you can use the --allow-incomplete-classpath option. The missing type is then reported at run time when it is accessed the first time.
Detailed message:
Trace: 
	at parsing org.postgresql.util.internal.Unsafe.credentialCacheExists(Unsafe.java:18)
Call path from entry point to org.postgresql.util.internal.Unsafe.credentialCacheExists(): 
	at org.postgresql.util.internal.Unsafe.credentialCacheExists(Unsafe.java:17)
	at org.postgresql.core.v3.ConnectionFactoryImpl.credentialCacheExists(ConnectionFactoryImpl.java:413)
	at org.postgresql.core.v3.ConnectionFactoryImpl.enableGSSEncrypted(ConnectionFactoryImpl.java:430)
	at org.postgresql.core.v3.ConnectionFactoryImpl.tryConnect(ConnectionFactoryImpl.java:146)
	at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:245)
	at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:51)
	at org.postgresql.jdbc.PgConnection.<init>(PgConnection.java:225)
	at org.postgresql.Driver.makeConnection(Driver.java:466)
	at org.postgresql.Driver.access$100(Driver.java:63)
	at org.postgresql.Driver$ConnectThread.run(Driver.java:376)
	at java.lang.Thread.run(Thread.java:833)
	at com.oracle.svm.core.thread.JavaThreads.threadStartRoutine(JavaThreads.java:596)
	at com.oracle.svm.core.posix.thread.PosixJavaThreads.pthreadStartRoutine(PosixJavaThreads.java:192)
	at com.oracle.svm.core.code.IsolateEnterStub.PosixJavaThreads_pthreadStartRoutine_e1f4a8c0039f8337338252cd8734f63a79b5e3df(generated:0)
...
```

### How to Reproduce?

```
./mvnw -Dnative -Dnative.surefire.skip -pl integration-tests/jpa-postgresql package -Dquarkus.native.builder-image=quay.io/quarkus/ubi-quarkus-native-image:21.3-java17
```

### Output of `uname -a` or `ver`

5.14.15-200.fc34.x86_64 #1 SMP Wed Oct 27 15:53:30 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

### Output of `java -version`

OpenJDK 64-Bit Server VM Temurin-11.0.13+8 (build 11.0.13+8, mixed mode)

### GraalVM version (if different from Java)

OpenJDK 64-Bit Server VM GraalVM CE 21.3.0 (build 17.0.1+12-jvmci-21.3-b05, mixed mode, sharing)

### Quarkus version or git rev

132d9ea09b795d6027d557f46627092cfb29ce29

### Build tool (ie. output of `mvnw --version` or `gradlew --version`)

Apache Maven 3.8.1 (05c21c65bdfed0f71a2f2ada8b84da59348c4c5d)

### Additional information

The issue is only reproducible on Java 17 and it seems to be resolved by passing:
```
-Dquarkus.native.additional-build-args="--add-exports=java.security.jgss/sun.security.krb5=ALL-UNNAMED"
```

Note that this is not a Quarkus issue. I am able to reproduce it using just GraalVM CE and https://github.com/zakkak/issue-reproducers/tree/krb5-credentials-failure-java17
diff --git a/core/deployment/src/main/java/io/quarkus/deployment/pkg/steps/NativeImageBuildStep.java b/core/deployment/src/main/java/io/quarkus/deployment/pkg/steps/NativeImageBuildStep.java
index 1cf26f6762a..418c251c7c7 100644
--- a/core/deployment/src/main/java/io/quarkus/deployment/pkg/steps/NativeImageBuildStep.java
+++ b/core/deployment/src/main/java/io/quarkus/deployment/pkg/steps/NativeImageBuildStep.java
@@ -592,6 +592,15 @@ public NativeImageInvokerInfo build() {
                  */
                 nativeImageArgs.add("-H:-ParseOnce");
 
+                /**
+                 * This makes sure the Kerberos integration module is made available in case any library
+                 * refers to it (e.g. the PostgreSQL JDBC requires it, seems plausible that many others will as well):
+                 * the module is not available by default on Java 17.
+                 * No flag was introduced as this merely exposes the visibility of the module, it doesn't
+                 * control its actual inclusion which will depend on the usual analysis.
+                 */
+                nativeImageArgs.add("-J--add-exports=java.security.jgss/sun.security.krb5=ALL-UNNAMED");
+
                 handleAdditionalProperties(nativeImageArgs);
 
                 nativeImageArgs.add(
['core/deployment/src/main/java/io/quarkus/deployment/pkg/steps/NativeImageBuildStep.java']