Bump Debian version from Buster to Bullseye, and rebuild Linux libraries

[illwieckz]

• Bump Debian version from Buster to Bullseye for Linux engine build.
• Bump Debian version from Buster to Trixie for things not producing linux binaries, like MinGW and NaCl vms.
• Bump CMake in Debian.
• Bump CMake in Darling.
• Rebuild as much as Linux libraries as possible.
• It now use three images for building engines: one for building Linux binaries, one for MinGW binaries, and one for macOS binaries, allowing finer configuration.
• Those images are now kept the same and aren't rebuilt according to the amount and nature of engine targets to be built.
• A rework preventing more image invalidations was done.

We want to use most recent libraries as possible, and those being the same on all platforms as much as we can.

It assumes DaemonEngine/Daemon#1433 is merged (so it should be merged first):

• Revamp external_deps build, update lib versions, switch to SDL3 DaemonEngine/Daemon#1433

It obsoletes #36:

• docker: use newer CMake from buster-backports #36

[illwieckz]

About the Debian bump:

• Time to bump from Debian Buster to Bullseye the baseline for precompiled packages and deps Unvanquished#3393

For rebuilding as much as Linux libraries as we can, this is because it is stupid to rely on old-old-stable or old-stable libraries while we actually review newer libraries.

And there is no reason Linux builds get those very old libraries and don't benefit from newer optimizations and things like that while macOS and Windows get all the shiny toys.

[illwieckz]

The reason why this still uses the system's nettle is because of that:

/Unvanquished/daemon/external_deps/linux-arm64-default_11/lib/libnettle.a(fat-arm64.o):
 in function `fat_init':
/Unvanquished/daemon/external_deps/build-linux-arm64-default_11/nettle/nettle-3.10.2/fat-arm64.c:289:
 (.text.startup+0x27c): relocation truncated to fit: R_AARCH64_LD64_GOTPAGE_LO15 against symbol
 `_nettle_sha256_compress_n_c' defined in .text section
 in /Unvanquished/daemon/external_deps/linux-arm64-default_11/lib/libnettle.a(sha256-compress-n.o)
/usr/lib/gcc-cross/aarch64-linux-gnu/10/../../../../aarch64-linux-gnu/bin/ld:
 /Unvanquished/daemon/external_deps/build-linux-arm64-default_11/nettle/nettle-3.10.2/fat-arm64.c:289:
 warning: too many GOT entries for -fpic, please recompile with -fPIC
collect2: error: ld returned 1 exit status

I'm aware of this for months now, maybe a year, but I never found what was causing this.

Actually this is not affecting amd64/i686 builds. This may be a bug in nettle.

So for now the Linux release build still relies on nettle as provided by the system.

[illwieckz]

I'm now switching to Bookworm as Debian old-stable since Trixie is out.

Edit: I went back to Bullseye for Linux builds.

[illwieckz]

So DaemonEngine/Daemon#1433 has been merged:

• Revamp external_deps build, update lib versions, switch to SDL3 DaemonEngine/Daemon#1433

So we now need this branch to build the current Dæmon's master branch.

[slipher]

I have reviewed build-release and build-external-dependencies.

LGTM modulo comment

[illwieckz]

I have reviewed build-release and build-external-dependencies.

Actually I forgot to remove the line building the deps for the VM (to fetch the nacl sdk) as we now rely on the dowloaded deps archive. This fix is just clean-up because that build-external-dependencies script is already not called anymore for vm builds, so that was just leftover I cleaned-up.

LGTM modulo comment

Thanks.