[Fixtures] Add pod monkey.podspec to test_repo

Allows to test #should_build? and is the dependency of BananaLib.
[Fixtures] Add OrangeFramework podspec to test_repo
Move PodTarget#host_requires_frameworks initialization into Installer

Because a PodTarget needs to know its #file_accessors to decide whether it has Swift sources.
Fix Installer#set_target_dependencies for non-build deps