RFR: 7903499: Update various versions used by jtreg's IDEA plugin

Tue Jun 20 09:13:27 UTC 2023

On Sat, 10 Jun 2023 18:00:16 GMT, Christoph <duke at openjdk.org> wrote:

> This enables building the plugin with never java versions
> 
> I tested with IntelliJ 2023.1.2 and java 17 and 19
> 
> Plugin still works

> ⚠️ Executable files are not allowed (file: plugins/idea/gradlew) 

Well that is a problem because updating gradle incldues a binary

Updated and removed executable bit

-------------

PR Comment: https://git.openjdk.org/jtreg/pull/157#issuecomment-1589778477
PR Comment: https://git.openjdk.org/jtreg/pull/157#issuecomment-1597712506