JUCE no longer depends on built artifacts of the AAX_SDK

When building for arm64 with a VS generator on a x86_64 host,
CMAKE_CROSSCOMPILING is not set, and copying the generator platform can
result in a juceaide binary that doesn't run on the host system.

The removed code no longer seems to be necessary when configuring with
newer Clion versions.

This reverts commit 4deea8ed93.

Prior to 26a23dfc the Android project exporter requested the Bluetooth
permission by default, and some PIPs depended on this behaviour.

abspath doesn't cope very well with paths that contain spaces, even if
those spaces are escaped.

Xcode 14 has minimum deployment targets of macos 10.13 and iOS 11.

Mirrors the behaviour of CMake by only adding signing identity field to
project when identity is not empty.

This is a breaking change - see BREAKING-CHANGES.txt