[jdk17u-dev] RFR: 8314495: Update to use jtreg 7.3.1

[Christoph Langer]

On Wed, 30 Aug 2023 19:25:05 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Atomically brings jtreg 7.3.1 (current at mainline) to 17u. Depending on new jtreg allows to cleanly backport tests from mainline without rewriting them for older jtreg.
> 
> Thankfully, @GoeLin backported all the actual test changes that are needed for this to work.
> 
> The uncleanliness comes mostly from the gtest "version" variable conflicts. Otherwise the whole stack applies cleanly.
> 
> Additional testing:
>  - [x] GHA
>  - [x] Linux AArch64 `tier1 tier2 tier3 tier4`

Marked as reviewed by clanger (Reviewer).

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PR Review: https://git.openjdk.org/jdk17u-dev/pull/1712#pullrequestreview-1605643599