More fixes related to 'The supplier returned null' message

[sberyozkin]

Fixes #27698.

@famod I haven't found any affected code inside CommonPanacheQueryImpl

[famod]

@sberyozkin

@famod I haven't found any affected code inside CommonPanacheQueryImpl

quarkus/extensions/panache/hibernate-reactive-panache-common/runtime/src/main/java/io/quarkus/hibernate/reactive/panache/common/runtime/CommonPanacheQueryImpl.java

Line 288 in 8e4ee68

.onFailure(CompletionException.class).transform(t -> t.getCause());

(@FroMage the comment above that line references an old, resolved mutiny issue. Is this still relevant at all?)

And there's still

quarkus/extensions/oidc/runtime/src/main/java/io/quarkus/oidc/runtime/OidcProviderClient.java

Line 163 in 19074a6

.atMost(oidcConfig.connectionRetryCount).onFailure().transform(t -> t.getCause());