[TASK] Increase SUFFIX uniqueness in `runTests.sh` for CI

This change adds the predefined GitLab CI/CD variable
`CI_JOB_ID` value to the suffix, used for containerized
network and container names, with the goal to increase
uniqueness in CI runs.

Additionally, the value is now displayed in execution
and the container cleanup notes at least the network
name further information source to investage unusually
container shutdowns.

[1] https://docs.gitlab.com/ee/ci/variables/predefined_variables.html

Resolves: #103928
Releases: main, 12.4, 11.5
Change-Id: I6cf8dddefd2b45ed6f5c8cca8aa5521319cc8c4b
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/84417


Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>