3996: CI: enable upload-artifact for all OS'es, not just win64

.github/workflows/ci.yml

@@ -165,13 +165,10 @@ jobs:
             cmakebuild/*.7z
             cmakebuild/*.7z.md5
 
-      # The other OS'es are disabled to save storage space. Can remove the `false` if necessary
-      # to re-enable them.
-
       # win32
       - name: Upload win32 artifact
         uses: actions/upload-artifact@v2
-        if: ${{ false && matrix.os == 'windows-2019' && matrix.tb-arch == 'Win32' }}
+        if: ${{ matrix.os == 'windows-2019' && matrix.tb-arch == 'Win32' }}
         with:
           name: win32
           path: |
@@ -181,7 +178,7 @@ jobs:
       # Linux
       - name: Upload Linux artifact
         uses: actions/upload-artifact@v2
-        if: ${{ false && matrix.os == 'ubuntu-18.04' && matrix.gcc-package == 'g++-7' }}
+        if: ${{ matrix.os == 'ubuntu-18.04' && matrix.gcc-package == 'g++-7' }}
         with:
           name: linux
           path: |
@@ -192,7 +189,7 @@ jobs:
       # macOS
       - name: Upload macOS artifact
         uses: actions/upload-artifact@v2
-        if: ${{ false && matrix.os == 'macos-10.15' && matrix.tb-build-type != 'asan' }}
+        if: ${{ matrix.os == 'macos-10.15' && matrix.tb-build-type != 'asan' }}
         with:
           name: macos
           path: |