Qt project configuration: restructure output settings

[zehnm]

To improve the build process and simplify project setup the build artefacts and binary output must be separated by architecture, compiler and build type (debug / release).
This is also a pre-requisite for the remote-os Docker build image with mapped project folders from the host. Otherwise different binary files will be mixed in the output if used on macOS or Windows. See related issue: https://github.com/YIO-Remote/remote-os/issues/21

Goals:

• [x] Aggregate all compiled binary output into common parent folder <main>/binaries. This includes main application and all plugins.
• [x] Store temporary build artefacts within project under <main>/<project>/build
• [x] Separate build and binary folders for different compilers and architectures: <Operating System>/<Compiler>/<Processor Architecture>/<Build Configuration>
• [x] Automatically detect architecture and compiler
• [x] Remove Qt Creator build-<project>-... directories
• This must work on:
  • [x] Linux
  • [x] Linux cross compile for RPi Zero
  • [x] remote-os Docker build image
  • [x] macOS
  • [x] Windows 10

Example:

[zehnm]

Implemented in feature branches project-setup in remote-software and all integration plugins. Needs further testing before PR.

[zehnm]

Closing issue: PR merged in dev branch