ci: Use GITHUB_OUTPUT envvar instead of set-output command (#2261)

`save-state` and `set-output` commands used in GitHub Actions are deprecated and [GitHub recommends using environment files](https://github.blog/changelog/2023-07-24-github-actions-update-on-save-state-and-set-output-commands/).

This PR updates the usage of `::set-output` to `"$GITHUB_OUTPUT"`

Instructions for envvar usage from GitHub docs:

https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#setting-an-output-parameter

Co-authored-by: Henry van der Vegte <[email protected]>

Author: arunsathiya

.github/workflows/ingestion_client.yaml

@@ -23,9 +23,9 @@ jobs:
           set -u -e -o pipefail
           version=$(cat ./samples/ingestion/ingestion-client/Setup/ArmTemplateBatch.json | jq -r .variables.Version)
           versionRealtime=$(cat ./samples/ingestion/ingestion-client/Setup/ArmTemplateRealtime.json | jq -r .variables.Version)
-          echo ::set-output name=version::$version
+          echo version=$version >> "$GITHUB_OUTPUT"
           echo "Batch template: ${version}"
-          echo ::set-output name=versionRealtime::$versionRealtime
+          echo versionRealtime=$versionRealtime >> "$GITHUB_OUTPUT"
           echo "Realtime template: ${versionRealtime}"
 
       - name: Verify Release Versions