RFR: 7904083: Print fatal error messages to stderr [v4]

[SendaoYan]

On Wed, 28 Jan 2026 15:37:09 GMT, Christian Stein <cstein at openjdk.org> wrote:

> > [CODETOOLS-7904083](https://bugs.openjdk.org/browse/CODETOOLS-7904083): Print fatal error messages to stderr (Enhancement - P4) ⚠️ Issue is not open.
> 
> Please also close this PR after closing the underlying issue.

Okey

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PR Comment: https://git.openjdk.org/jtreg/pull/290#issuecomment-3814782669