Trim and fix CI

Upstream's workflows came in with the 1.7.0 merge (fork master had
none) and need adjustments to run cleanly on github.com:

- upload-artifact pinned to v8 doesn't exist (max v7); revert the
  upstream "alignment" bump (0b4c6dd).
- Linux and WII workflows are off-target for this fork; remove.
- Root settings-header.pl didn't know the fork's `nsarray` setting
  type; treat like `null`.
- machine.c and ui/sdl/sdlkeyboard.c include fusepb/FuseMenus.h
  without a guard, breaking autotools UI builds. Pre-existing fork
  issue, out of merge scope; drop the Fuse-UI fan-out jobs from
  build_macos.yml and build_windows.yml until the include is
  conditional. Libspectrum sub-builds, which pass, remain.

Author: morozov

.github/workflows/build_libspectrum_linux_sub.yml

@@ -144,7 +144,7 @@ jobs:
           -C /usr/local/ -T.tar_files
 
       - name: (12) Upload generated tar file
-        uses: actions/upload-artifact@v8
+        uses: actions/upload-artifact@v7
         with:
           name: libspectrum-installed-macos-${{ inputs.key }}
           path: |

.github/workflows/build_libspectrum_macos_sub.yml

@@ -223,7 +223,7 @@ jobs:
           -C /usr/local/i686-w64-mingw32/ .
 
       - name: (15) Upload generated tar file
-        uses: actions/upload-artifact@v8
+        uses: actions/upload-artifact@v7
         with:
           name: libspectrum-installed-windows-${{ inputs.key }}
           path: |