Ubuntu 22 (Linux arm runner) fixes (#17643)

Our GitHub Actions Linux ARM hosted runner was running Ubuntu 20 was EOL'd.

This gets builds working on the Ubuntu 22 Linux ARM runner which have spun to replace the EOL'd one. It pushes forward our Glibc requirement for Linux ARM users (was >= 2.29, now >= 2.35; sorry!) but also uses a newer version of clang/llvm (was 10, now 15; yay!).

.github/workflows/ci.yml

@@ -339,7 +339,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
-  bundle-linux-aarch64:
+  bundle-linux-aarch64: # this runs on ubuntu22.04
     timeout-minutes: 60
     name: Create arm64 Linux bundle
     runs-on:
@@ -360,8 +360,8 @@ jobs:
       - name: Set up Clang
         run: |
           sudo apt-get update
-          sudo apt-get install -y llvm-10 clang-10 build-essential cmake pkg-config libasound2-dev libfontconfig-dev libwayland-dev libxkbcommon-x11-dev libssl-dev libsqlite3-dev libzstd-dev libvulkan1 libgit2-dev
-          echo "/usr/lib/llvm-10/bin" >> $GITHUB_PATH
+          sudo apt-get install -y llvm-15 clang-15 build-essential cmake pkg-config libasound2-dev libfontconfig-dev libwayland-dev libxkbcommon-x11-dev libssl-dev libsqlite3-dev libzstd-dev libvulkan1 libgit2-dev
+          echo "/usr/lib/llvm-15/bin" >> $GITHUB_PATH
 
       - uses: rui314/setup-mold@0bf4f07ef9048ec62a45f9dbf2f098afa49695f0 # v1
         with: