RFR: 8330621: Make 5 compiler tests use ProcessTools.executeProcess [v2]

[Evgeny Nikitin]

On Fri, 19 Apr 2024 11:51:50 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

> Do you know that you also could skip explicitly creating ProcessBuilders and instead run:
Tried to be as less intrusive as possible :). But I agree, the fewer lines the better. Fixed.

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PR Comment: https://git.openjdk.org/jdk/pull/18856#issuecomment-2066723291