CI: Build riscv64 in CI

Don't run any tests on riscv64 for now, since some tests still fail
(mostly due to missing generic AK/Math.h implementations).

.github/workflows/ci.yml

@@ -23,6 +23,11 @@ jobs:
             arch: 'aarch64'
             debug_options: 'NORMAL_DEBUG'
 
+          - toolchain: 'GNU'
+            os: ubuntu-22.04
+            arch: 'riscv64'
+            debug_options: 'NORMAL_DEBUG'
+
           - toolchain: 'GNU'
             os: ubuntu-22.04
             arch: 'x86_64'

.github/workflows/serenity-template.yml

@@ -157,7 +157,7 @@ jobs:
         run: ninja install && ninja qemu-image
 
       - name: Run On-Target Tests
-        if: ${{ inputs.debug_options == 'NORMAL_DEBUG' && inputs.arch != 'aarch64' }}
+        if: ${{ inputs.debug_options == 'NORMAL_DEBUG' && inputs.arch != 'aarch64' && inputs.arch != 'riscv64' }}
         working-directory: ${{ steps.build-parameters.outputs.build_directory }}
         env:
           SERENITY_QEMU_CPU: "max,vmx=off"