Implement JDK PQC availability detection#6244
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Follow-up to #6236.
JdkSSLEngineOptions.isPqcAvailable()was hardcoded to false. This PR implements the actual detection using the multi-release JAR pattern already in place:SSLParameters.getNamedGroups()for the presence of at least one PQ-compliant group (X25519MLKEM768,SecP256r1MLKEM768,SecP384r1MLKEM1024)JdkSSLEngineOptions.isPqcAvailable()now delegates toJdkDependent.isPqcAvailable(), meaning STRICT and CLIENT_NEGOTIATED enforcement policies will automatically auto-select the JDK engine for PQC once a supporting JDK is available (expected JDK 25 backport, October 2026).