RFR: 8297455: Use the official ToolProvider API to call javac

Tue Nov 22 20:59:03 UTC 2022

On Tue, 22 Nov 2022 20:50:04 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

> In JDK-8297041, the javacserver was moved out of the JDK itself, and lifted out as a separate buildtool. Due to this, internal classes in jdk.compiler were no longer available. Therefore, the closest way to calling javac as before were to use `com.sun.tools.javac.Main.compile()`. This method is however deprecated for removal, and relying on that was only needed as a temporary measure during the transition.
> 
> After the major refactoring of the javacserver tool in JDK-8297444, it will be easy to replace the Main.compile API with the official ToolProvider API instead.

Note that this PR is dependent on JDK-8297444 (PR: https://github.com/openjdk/jdk/pull/11298)

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PR: https://git.openjdk.org/jdk/pull/11299