[MPMD-385] Support for --enable-preview

[jira-importer]

Gili opened MPMD-385 and commented

When running PMD against classes compiled using --enable-preview I get:

[WARNING] Error during type resolution of field <redacted> in class <redacted> due to: java.lang.UnsupportedClassVersionError: Preview features are not enabled for gg/soulbound/optimus/server/Server (class file version 64.65535). Try running with '--enable-preview'

It seems that PMD expects us to pass --enable-preview, but the Maven plugin does not provide a mechanism for doing so. I tried setting targetJdk to "20-preview" but that didn't help either.

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Affects: 3.21.0