Suppress Pattern annotation on property of type byte array

[tjquinno]

Resolves #19345

The Helidon-specific template for MP bean validation now suppresses the @Pattern annotation if the property is a byte array, as the annotation applies properly only to strings.

The PR includes an additional small yaml file and two sample config files, one for Helidon v3 and one for Helidon v4 (plus the new generated sample files).

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[wing328]

shall we add the new sample folders to the github workflow so that these will be tested moving forward?

[tjquinno]

Yes, good catch. I'll push another commit right away.