Merged PR 37066: Update the test image for SDK tests

Update the test image for SDK tests

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#### AI description  (iteration 1)
#### PR Classification
This PR is a configuration update aimed at improving SDK test reliability by using an updated Ubuntu test image.

#### PR Summary
The pull request updates the pipeline configuration to reference a new test image version for SDK validation.
- `.pipelines/PowerShell-Release-Official.yml`: Changed `imageName` from `PSMMSUbuntu20.04-Secure` to `PSMMSUbuntu22.04-Secure`.
<!-- GitOpsUserAgent=GitOps.Apps.Server.pullrequestcopilot -->

Author: adityapatwardhan

.pipelines/PowerShell-Release-Official.yml

@@ -156,7 +156,7 @@ extends:
         parameters:
           jobName: "LinuxSDK"
           displayName: "Linux SDK Validation"
-          imageName: PSMMSUbuntu20.04-Secure
+          imageName: PSMMSUbuntu22.04-Secure
           poolName: $(ubuntuPool)
 
     - stage: gbltool