fix(systems): Fix flaky query builder value selection and improve variable dropdown assertions

[BlankaOnodi]

Pull Request

🤨 Rationale

Fix flaky query builder value selection and improve variable dropdown assertions:

• click({ force: true }) uses coordinates that can land on a wrong option when the dropdown is clipped. evaluate(el => el.click()) is coordinate-free
• the missing input:focus wait caused dropped characters.
• toHaveCount catches cases where the filter returns all results instead of the expected subset.

Task 3813278: update selectQueryBuilderValueOption to be more reliable

👩‍💻 Implementation

Replace click({ force: true }) with evaluate(el => el.click()) for dropdown option selection, add input:focuswait before typing in plain text fields, and add a toHaveCount assertion for the variable dropdown.

🧪 Testing

Verified all acceptance tests pass locally by running the affected test files.

✅ Checklist

• This PR has a title that follows the commit message format.