Add remaining WK2 API tests to Tools/TestWebKitAPI/PlatformNix.cmake

The following tests are passing:
- CloseThenTerminate
- DidAssociateFormControls
- InjectedBundleFrameHitTest
- LoadPageOnCrash
- ReloadPageAfterCrash
- ResizeWindowAfterCrash
- TerminateTwice
- WKURL

The following tests are failing:
- PageVisibilityState
- WillLoad

The following tests fail to compile and were not included in the cmake file:
- SeccompFilters
- WebArchive
- WebCoreStatisticsWithNoWebProcess

Reviewed by: Hugo Lima