Unify the PQC tests with PQC http example

[JiriOndrusek]

Description

Both

• PQC tests ( Add HTTP PQC Example for Java 17 camel-quarkus-examples#494)
• http-pqc-j17 example (https://github.com/apache/camel-quarkus-examples/tree/camel-quarkus-main/http-pqc-j17)

are using almost the same code for certificate generation/validation. It should be possible to refactor the example to use util classes from PQC-certificate-generator module
(and also double heck, that both algorithms are the ame)