Revert "revert container build changes"

This reverts commit 23e2469.

.github/workflows/build-reuse-unix.yml

@@ -75,12 +75,23 @@ jobs:
   build-unix-reuse:
     name: Build
     runs-on: ${{ inputs.os }}
+    container: ${{ fromJSON('{"ubuntu-20.04":"ghcr.io/microsoft/msquic/linux-build-xcomp:20.04","ubuntu-22.04":"ghcr.io/microsoft/msquic/linux-build-xcomp:22.04"}')[inputs.os] }}
     steps:
     - name: Checkout repository
       uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
       with:
         fetch-depth: 0
+    - name: Set ownership
+      if: inputs.os == 'ubuntu-20.04' || inputs.os == 'ubuntu-22.04'
+      run: |
+        # this is to fix GIT not liking owner of the checkout dir
+        chown -R $(id -u):$(id -g) $PWD
+    - name: Prepare Machine (docker based)
+      if: inputs.os == 'ubuntu-20.04' || inputs.os == 'ubuntu-22.04'
+      shell: pwsh
+      run: scripts/prepare-machine.ps1 -ForOneBranch -InitSubmodules -Tls ${{ inputs.tls }}
     - name: Prepare Machine
+      if: inputs.os == 'macos-12'
       shell: pwsh
       run: scripts/prepare-machine.ps1 -ForBuild -Tls ${{ inputs.tls }}
     - name: Build For Test
@@ -95,4 +106,4 @@ jobs:
       uses: actions/upload-artifact@0b7f8abb1508181956e8e162db84b466c27e18ce
       with:
         name: ${{ inputs.config }}-${{ inputs.plat }}-${{ inputs.os }}-${{ inputs.arch }}-${{ inputs.tls }}${{ inputs.static }}${{ inputs.clang }}${{ inputs.systemcrypto }}${{ inputs.codecheck }}${{ inputs.sanitize }}${{ inputs.test }}
-        path: artifacts
+        path: artifacts