boot/universe.sh: Add tests to keep MK_LOADER_BIOS_TEXTONLY working

Sponsored by: Netflix

Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

Remove the riscv64sf architecture.

Reviewed by: jrtc27, arichardson, br, kp, imp, emaste
Differential Revision: https://reviews.freebsd.org/D39496

stand: Remove i386-only support fire firewire

Remove support for booting off of firewire, and for having dcons via
firewire in the loader. Kernel support for these things is unchanged.
Discussed on arch@ and the current state is not working (and the build
was wrong to boot).

Sponsored by: Netflix
Discussed: https://lists.freebsd.org/archives/freebsd-arch/2022-November/000267.html
Reviewed by: kevans, melifaro, emaste
Differential Revision: https://reviews.freebsd.org/D37334

tools/boot: Fix universe.sh's ZFS exclusion test

MK_LOADER_ZFS is the current spelling of enabling or disabling ZFS
builds. Use it instead of MK_ZFS.

Sponsored by: Netflix
Reviewed by: tsoome
Differential Revision: https://reviews.freebsd.org/D35896

test: Update boot universe build architectures

We build lua by default, so we don't need another build to build it
enabled w/o FORTH. That gives little value over the without forth
builds. Remove all mips, they are no longer relevant. Build aarch64
everywhere we build amd64 (except firewire which is x86 only). Build a
few more architectures once so we have at least one of every arch we
support in at least the default build. This should increase coverage
and still take less time than before.

Sponsored by: Netflix

Spell LOADER correctly so we test lua build.

Catch up to arm/arm and sparc64 removal.

When we have an invalid build option, don't rm -rf the current
directory.

Add a quick sanity check to objdir before using it. It must start
with /. If there was a make error getting it, report that and continue
with the next target. If there was anything else, bail out.

Remove armeb from the list of architectures we build for the boot
laoder testing scripts. It just adds to the build time, and will be
retired soon anyway, per discussions in freebsd-arch@ last month.

Add LOADER_DEBUG regression test

Add lua to build script

Build WITHOUT_FORTH too, at least for amd64 and i386

Sponsored by: Netflix

Just use the last line of the output from getting .OBJDIR. The
buildenv target prints other stuff too that needs to be ignored.

Sponsored by: Netflix

Remove the entire objdir tree to avoid picking up stale binaries from
prior builds. Move GELI to building first.

Sponsored by: Netflix

Move sys/boot to stand. Fix all references to new location

Sponsored by: Netflix

Move LOADER_{NO,}_GELI_SUPPORT to MK_LOADER_GELI

Transition to WITH/WITHOUT_LOADER_GELI to flag support or not of GELI
in the boot loaders. Add HAVE_GELI so components can flag they need
support (since it's too large to include everywhere). Add temporary
warnings for the old forms to ease transition.

Also, update test script to build without GELI on x86.

Sponsored by: Netflix

Replace LOADER_FIREWIRE_SUPPORT variable

Rename LOADER_FIREWIRE_SUPPORT to MK_LOADER_FIREWIRE. Only build
libfirewire when this is "yes". Add note to updating. Fix build script
to build this for x86 so the option doesn't decay. sparc64 supports
ZFS, so also build it MK_ZFS=no.

Sponsored by: Netflix

Fix parallel build issues and add MK_ZFS=no case

To ensure that I don't break the MK_ZFS=no case (currently working),
add that to the build, at least for i386 and amd64. Also, out of an
abundance of caution, clean single threaded, and then build in a
separate make. Otherwise, I hit a race where we build before objdir
has been created, which breaks at the moment.

Sponsored by: Netflix

Do a chdir to SRCTOP/sys/boot before starting the run. This lets one
run this script from anywhere, but makes it only work on sys/boot.

Sponsored by: Netflix

Create a shell script to build sys/boot on all the architectures.

One could run this from any directory, but it's designed to do
regression testing on sys/boot (it only tests on a subset of
architectures since all of them would take a lot longer and not help).
This will also ensure that future commits to sys/boot compile
everywhere.

Sponsored by: Netflix