RFR: JDK-8296968: Update langtools tests to use @enablePreview

[Jim Laskey]

On Mon, 14 Nov 2022 22:02:42 GMT, Joe Darcy <darcy at openjdk.org> wrote:

> Update langtools tests to use JTreg's @enablePreview tag, where appropriate.

Just as a note: when using @enablePreview it is unnecessary to use @run main/othervm ... . That is the @run statement can be dropped.

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PR: https://git.openjdk.org/jdk/pull/11149