Draft: #3399746 with fixes in related tickets

This MR exists to ensure we've fixed all strict type errors before adding the declaration.

added 10 commits

• ecbfc7e8 - Fix ContentTranslationUITestBase
• 030ce8e6 - Fix FileFieldRevisionTest
• e8a7ad57 - Fix BlockContentTest
• 2086cdba - Fix TermTest
• b8f895a6 - Fix FieldWebTest
• 9f8b2349 - Fix FileOnTranslatedEntityTest
• 83816f75 - Fix PrivateFileOnTranslatedEntityTest
• eb55fd60 - Fix TourTestBase
• 14510626 - Fix CheckboxTest
• 305cc2d6 - Update line numbers in tests

Compare with previous version

added 3 commits

• 743a6a60 - Fix TourTestBase
• 80e3de29 - Fix CheckboxTest
• 0c89bc8b - Update line numbers in tests

Compare with previous version