[lworld] RFR: 8350109: [lworld] Adopt jtreg 7.5.1

[Christian Stein]

On Fri, 14 Feb 2025 15:43:54 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

> Jtreg is updated to 7.5.1
> 7.5.1 drops support for LIBRARY.properties.
> Some tests have added @enableProperties to pass.

test/docs/TEST.ROOT line 1:

> 1: #

Interesting, that file `test/docs/TEST.ROOT` was not yet touched by https://github.com/openjdk/jdk/pull/20766 - will update it to use 7.5.1 as well.

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PR Review Comment: https://git.openjdk.org/valhalla/pull/1369#discussion_r1956512761