Meta+CI: Upgrade to ubuntu-22.04

This commit upgrades Github Actions workers to ubuntu-22.04

As part of that change, we (currently) no longer need the backports
nor toolchain-r/test PPAs, because ubuntu-22.04 include
recent-enough version of QEMU and gcc

Meta/Azure/Lagom.yml

@@ -13,7 +13,7 @@ jobs:
 
     - name: job_pool
       ${{ if eq(parameters.os, 'Linux') }}:
-        value: ubuntu-20.04
+        value: ubuntu-22.04
       ${{ if eq(parameters.os, 'macOS') }}:
         value: macos-11
 

Meta/Azure/Serenity.yml

@@ -15,7 +15,7 @@ jobs:
       value: $(Build.SourcesDirectory)/.ccache
 
     pool:
-      vmImage: ubuntu-20.04
+      vmImage: ubuntu-22.04
 
     steps:
     - template: Setup.yml

Meta/Azure/Setup.yml

@@ -7,10 +7,8 @@ steps:
 
   - ${{ if eq(parameters.os, 'Serenity') }}:
     - script: |
-        sudo add-apt-repository ppa:canonical-server/server-backports
-        sudo add-apt-repository ppa:ubuntu-toolchain-r/test
         wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
-        sudo add-apt-repository 'deb http://apt.llvm.org/focal/ llvm-toolchain-focal-14 main'
+        sudo add-apt-repository 'deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-14 main'
         sudo apt-get update
         sudo apt-get install clang-format-14 ccache e2fsprogs gcc-11 g++-11 libstdc++-11-dev libmpfr-dev libmpc-dev ninja-build qemu-utils qemu-system-i386 unzip lld
       displayName: 'Install Dependencies'
@@ -18,9 +16,8 @@ steps:
   - ${{ if eq(parameters.os, 'Linux') }}:
     - script: |
         sudo apt-get purge -y clang-11 clang-12 gcc-10
-        sudo add-apt-repository ppa:ubuntu-toolchain-r/test
         wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
-        sudo add-apt-repository 'deb http://apt.llvm.org/focal/ llvm-toolchain-focal-13 main'
+        sudo add-apt-repository 'deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-13 main'
         sudo apt-get update
         sudo apt-get install ccache gcc-11 g++-11 clang-13 libstdc++-11-dev ninja-build unzip
 

Meta/Azure/Toolchain.yml

@@ -9,7 +9,7 @@ jobs:
       value: 20GB
 
     pool:
-      vmImage: ubuntu-20.04
+      vmImage: ubuntu-22.04
 
     steps:
     - template: Setup.yml