Coming soon: jtreg 7.5.2

[Christian Stein]

JDK folk,

This is a general heads-up that jtreg 7.5.2 is ready for use and
that we should soon update JDK to use it. The most significant
changes in jtreg 7.5.2 are minor improvements. It also contains
a few new features and some bug fixes.

Find a listing of all noteworthy changes at [1].

The plan is to make jtreg 7.5.2 the default version for JDK 25-ea
by end of May 2025.

Thanks to everyone who has helped thus far!

[1] https://github.com/openjdk/jtreg/blob/jtreg-7.5.2+1/CHANGELOG.md