RFR: 8295294: Misc cleanups in runtime/InvocationTests

[David Holmes]

On Thu, 13 Oct 2022 18:17:42 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

> Address the following problems in runtime/InvocationTests:
>   - Test case tracing output is omitted;
>   - Stand-alone test case executors are broken.
> 
> Testing: manual

All looks reasonable. Thanks.

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Marked as reviewed by dholmes (Reviewer).

PR: https://git.openjdk.org/jdk/pull/10701