DolphinQt: Add entitlement to allow debugger to attach in Debug builds

[merryhime]

In order to attach a debugger to a process with a Hardened Runtime (e.g. on an M1 mac), one needs the com.apple.security.get-task-allow entitlement.

Normally this entitlement is injected by XCode when running from XCode (assuming the XCode attribute CODE_SIGN_INJECT_BASE_ENTITLEMENTS is enabled), but this doesn't happen when building from a makefile or when you manually specify entitlements directly to codesign like this.

[JosJuice]

Is there a reason why we don't want to allow this for release builds too?

[Tilka]

Debug features might make exploits easier and are probably disabled by default for a reason. Dolphin isn't exactly trying hard to be secure when running untrusted code but no need to add more weak points.