Pin Ubuntu 22.04 for agent version in pipelines (#1175)

* Install libssl-dev

* Add repo

* Use 22.04

Author: Charles-Gagnon

builds/azure-pipelines/build-pr.yml

@@ -36,7 +36,7 @@ stages:
   - job: Linux
     timeoutInMinutes: 90
     pool:
-      vmImage: ubuntu-latest
+      vmImage: ubuntu-22.04 # Ubuntu 24.04 causes an error about missing libssl - using 22.04 for now
     workspace:
       clean: all
     steps: