[Internal] Add extra requirements "azure" for promptflow package (#2699)

* add pf azure pkg in ci

* update

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Co-authored-by: yalu4 <yalu4@microsoft.com>

scripts/promptflow-ci/requirement.txt

@@ -3,6 +3,6 @@ azure-identity
 markdown
 bs4
 azureml-core
-promptflow
+promptflow[azure]
 azure-ai-ml
 azure-cli-core