[META] Test e2e optimization

[Maymanaf]

Description and goal

Topic 1: #10584
The current modals, such as STDCM, have grown too large, with some exceeding 800 lines of code. This makes them difficult to understand and maintain. These modals need to be split into simplified versions to improve readability and modularity.

Topic 2: #10584
Page models with large numbers of locators can be challenging to navigate. Locators are currently declared both in the class and the constructor, leading to redundancy. This process should be optimized so that locators are declared only once.

Topic 3: #10585
Currently, the STDCM environment is restored only after all tests have finished. If a test run is canceled or encounters an issue, developers face difficulties restoring their previous environment. To address this, the STDCM environment should be reset in the afterEach hook instead of waiting for the global teardown.

Topic 4: #10586

The CI execution time for tests is high, taking approximately 8–9 minutes after stability fixes (#10423). To improve performance, tests should run on a single browser (defaulting to Chromium due to its lack of GPU issues and ability to handle map tests). For the merge queue, tests should run on two browsers(Firefox and Chrome)

Acceptance criteria

• Simplify Modals: Separate and split large modals, such as STDCM, into smaller, more maintainable components.
• Optimize Locator Management: Consolidate locator declarations to reduce redundancy and improve readability.
• Environment Reset in afterEach: Move STDCM environment restoration from the global teardown to the afterEach hook.
• Improve CI Performance: Update CI configuration to:
  • Run tests on a single browser (Chromium) by default.
  • Run tests on two browsers (Firefox and Chrome) for the merge queue.