Add dynamic test and demo for integrity

For the goal of this test, I’d prefer a dynamic and less invasive validation method, such as Frida hooking or LLDB. Static patching plus re-signing can introduce unrelated side effects, like changing team ID, entitlements, or bundle identifier, which can break Keychain access for example.

It's okay though, just personal preference.

Originally posted by @sgIOlas in https://github.com/OWASP/mastg/pull/3871#discussion_r3409837144