Add apple test's host app as a target dependency in generated xcode project

Created by: ProfessaA

background

Previously, the generated xcode project for apple_tests that specified a host app, did not add the app under the test's "Target Dependencies" build phase. As a result, these tests failed to build if the host app hadn't already been built.

change

Adds the host app under the test target's "Target Dependencies" build phase.

verification

• verify that the host app is a target dependency for unit tests with a specified host app
• verify that the host app is a target dependency for UI tests
• verify that logic tests without host apps continue to be generated correctly
• verify that tests with host apps in a different project don't add the app as a target dependency
• update ProjectGeneratorTest