Drop fromEnv toolchain restriction for local environment

[bric3]

What Does This Do

Drop the restrictions on the toolchain lookup features. However maintain the restrictions when running in CI.

This reduce the friction when setting up a new project ; this still requires to have the environment variables when using the testJvm property.

Motivation

In order to allow running on later JDK, we need to drop some constraints on which JDK to look for. This will help in particular

• Bump spotbugs gradle plugin to 6.4.5 #9748
• Bump spotless to latest version 8.1.0 #9881

Maybe we can even drive the actual JVM used by gradle with

• Enforce a JDK 21 to run Gradle #9747

Additional Notes

A follow-up PR, removes the need to have JAVA_xx_HOME environment variables locally, to use the testJvm feature.

• Drop the requirement of jvm environment variables for testJvm constraint #9968

Contributor Checklist

• Format the title according the contribution guidelines
• Assign the type: and (comp: or inst:) labels in addition to any useful labels
• Don't use close, fix or any linking keywords when referencing an issue.
  Use solves instead, and assign the PR milestone to the issue
• Update the CODEOWNERS file on source file addition, move, or deletion
• Update the public documentation in case of new configuration flag or behavior

Jira ticket: [PROJ-IDENT]

[PerfectSlayer]

💭 thought: ‏Interesting. I should keep a look at it to update the onboarding documentation and setup scripts. Feel free to remind me to update them when you think we are ready to drop the actual requirements.

[AlexeyKuznetsov-DD]

💭 thought: ‏Interesting. I should keep a look at it to update the onboarding documentation and setup scripts. Feel free to remind me to update them when you think we are ready to drop the actual requirements.

I agree on that, we need to update our readme files about fact that we need JAVA_xx_HOME for some tests.

[bric3]

I agree on that, we need to update our readme files about fact that we need JAVA_xx_HOME for some tests.

@AlexeyKuznetsov-DD You're fast :) I was working on this (as you saw). The #9968 is stacked on top of this PR.

I should keep a look at it to update the onboarding documentation and setup scripts. Feel free to remind me to update them when you think we are ready to drop the actual requirements.

I intentionally left this as a left-over as I'd like things to settle down before adapting the onboarding doc. The good thing is that currently it shouldn't require to change on laptop config.