RFR: 8274255: Update javac messages to use "enum class" rather than "enum type"

[Vicente Romero]

On Fri, 24 Sep 2021 19:11:08 GMT, Joe Darcy <darcy at openjdk.org> wrote:

> As a belated part of the terminology update (JDK-8246772), change
> 
> enum type -> enum class
> annotation type -> annotation interface
> 
> in javac's compiler.properties files. General analysis of the use of "type" in that file is beyond the scope of this PR.

lgtm

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Marked as reviewed by vromero (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/5689