closes acidanthera/bugtracker#2140

Updates build script according recent changes in efibuild. We need to
specify OpenCorePkg to be removed while build because currently this 
package is present as submodule in audk and conflicts

This should fix a problem with Linux platform which uses ELF binaries
which doesn't support multiarchitecture format like FAT. First of
all it fixes DUET build on Apple Silicon platforms

Add missing packages check and assumes to run this script as root.
Also we need to create partition table on raw image image before
invoking disk mount using qemu-nbd tool.

This replaces OpenCore signature checking with .contentVisibility file
containing either `Disabled` or `Auxiliary` to hide entries from the
boot picker.

REF: https://github.com/madler/zlib/issues/633

Docker allows to set up a portable development environment in a container. This
can be useful to test Linux toolchains on macOS. Introduce such environments
for EDK II and documentation development.

The current implementation supports both Dev Environments by Docker Desktop and
Dev Containers by Visual Studio Code. To reduce the maintenance burden, use
these environments for the Linux-based GitHub Actions as well. Non-x86 hosts,
including Apple Silicon, are supported via GCC cross-compilation.