Predictive Test Selection is disabled when running builds

[erichaagdev]

This PR adds the system property -Dpts.enabled=false to build invocations in order to disable PTS. The displayed invocation commands have also been updated to include the system property.

ℹ️ Note: The CI/Local experiments (exp5-gradle & exp4-maven) will also be invoked with -Dpts.enabled=false even if the original CI build did not have PTS disabled.

Closes #522

[erichaagdev]

@etiennestuder I want to make sure you see the note I have in the description:

The CI/Local experiments (exp5-gradle & exp4-maven) will also be invoked with -Dpts.enabled=false even if the original CI build did not have PTS disabled.

I think that is the desired state but it means we need to recommend users also disable PTS in the CI builds. Should we also update the wording then of the interactive mode to include this?

gradle-enterprise-build-validation-scripts/components/scripts/gradle/05-validate-remote-build-caching-ci-local.sh

Lines 276 to 287 in 5391c58

	${HEADER_COLOR}Run first build on CI agent${RESTORE}
	You can now trigger the first build on one of your CI agents. The invoked CI
	configuration should be a configuration that is typically triggered when
	building the project as part of your pipeline during daily development.
	Make sure the CI configuration uses the proper branch and performs a fresh
	checkout to avoid any build artifacts lingering around from a previous build
	that could influence the experiment.
	Once the build completes, make a note of the commit id that was used, and enter
	the URL of the build scan produced by the build.