Playwright improve test stability

[emilghittasv]

• Creating a new helper function in utilities.py that gives the possibility of re-calling a function which failed in the process due to a 502 error. This function relies on catching a warning emitted by the handle_502_error function inside conftest.py.
• Fix locators issues due to the transition from selectize to tom-select.
• Extended the checkbox_interaction() function in basepage.py to handle ElementHandles and implemented a retry mechanism if the element check() or uncheck() has failed due to some reason.
• Modified the click() function in basepage.py to:

1. Accept and interact with ElementHandles.
2. Implement a retry mechanism based on a given expected_locator or expected_url after the click action. If the expected_locator or expected_url condition is not fulfilled after the click action we are forcing a re-click on the target element.
3. Wait for networkidle before attempting to click on the element.

• Updated the page objects, tests and flows for which flakiness occurred in the past to use the newly implemented click() and function re-call mechanism.
• Added a helper function in basepage.py which moves the mouse to a given location.