Containerize Playwright end-to-end tests to resolve screenshot comparison issues caused by OS differences

[ljmotta]

Currently, some Playwright tests use screenshot comparisons, which are prone to failure due to operating system differences, such as variations in fonts and UI rendering [1][2][3]. These inconsistencies lead to unreliable test results across different environments.

To address this issue, we need to standardize how tests are executed within the kie-tools monorepo. By leveraging containers, we can create a stable, consistent environment for running tests, independent of the host OS. This approach ensures reproducibility and resolves screenshot comparison failures.

[1] microsoft/playwright#8161
[2] microsoft/playwright#16104
[3] microsoft/playwright#6907