git: openjdk/jdk17u-dev: 8355387: [jittester] Disable downcasts by default

[Satyen Subramaniam]

Changeset: 0b3561a6
Branch: master
Author:    Satyen Subramaniam <ssubramaniam at openjdk.org>
Date:      2025-10-22 16:30:02 +0000
URL:       https://git.openjdk.org/jdk17u-dev/commit/0b3561a675fb902400b0105fe87341ea7e738c1e

8355387: [jittester] Disable downcasts by default

Backport-of: b41e0b17490b203b19787a0d0742318fc0d03b33

! test/hotspot/jtreg/testlibrary/jittester/src/jdk/test/lib/jittester/ProductionParams.java