replace self-hosted arm64 linux with ubuntu-22.04-arm (rustdesk#10555)

https://github.blog/changelog/2025-01-16-linux-arm64-hosted-runners-now-available-for-free-in-public-repositories-public-preview/

Signed-off-by: 21pages <sunboeasy@gmail.com>

.github/workflows/flutter-build.yml

@@ -1398,7 +1398,7 @@ jobs:
               arch: aarch64,
               target: aarch64-unknown-linux-gnu,
               distro: ubuntu18.04,
-              on: [self-hosted, Linux, ARM64],
+              on: ubuntu-22.04-arm,
               deb_arch: arm64,
               vcpkg-triplet: arm64-linux,
             }
@@ -1411,13 +1411,15 @@ jobs:
             core.exportVariable('ACTIONS_RUNTIME_TOKEN', process.env.ACTIONS_RUNTIME_TOKEN || '');
 
       - name: Maximize build space
-        if: ${{ matrix.job.arch == 'x86_64' }}
         run: |
           sudo rm -rf /opt/ghc
           sudo rm -rf /usr/local/lib/android
           sudo rm -rf /usr/share/dotnet
           sudo apt-get update -y
-          sudo apt-get install -y nasm qemu-user-static
+          sudo apt-get install -y nasm
+          if [[ "${{ matrix.job.arch }}" == "x86_64" ]]; then
+            sudo apt-get install -y qemu-user-static
+          fi
 
       - name: Checkout source code
         uses: actions/checkout@v4
@@ -1713,7 +1715,6 @@ jobs:
 
   build-rustdesk-linux-sciter:
     if: ${{ inputs.upload-artifact }}
-    needs: build-rustdesk-linux # not for dep, just make it run later for parallelism
     runs-on: ${{ matrix.job.on }}
     name: build-rustdesk-linux-sciter ${{ matrix.job.target }}
     strategy:
@@ -1734,7 +1735,7 @@ jobs:
           - {
               arch: armv7,
               target: armv7-unknown-linux-gnueabihf,
-              on: [self-hosted, Linux, ARM64],
+              on: ubuntu-22.04-arm,
               distro: ubuntu18.04-rustdesk,
               deb_arch: armhf,
               sciter_arch: arm32,
@@ -2010,7 +2011,7 @@ jobs:
               target: aarch64-unknown-linux-gnu,
               # try out newer flatpak since error of "error: Nothing matches org.freedesktop.Platform in remote flathub"
               distro: ubuntu22.04,
-              on: [self-hosted, Linux, ARM64],
+              on: ubuntu-22.04-arm,
               arch: aarch64,
               suffix: "",
             }