[Storage] Improve generate_blob_sas version_id documentation (#29802)

* Clarify vid not in output SAS

* Revert "Clarify vid not in output SAS"

This reverts commit ce39666.

* Clarify vid not in output SAS

* Revert "Clarify vid not in output SAS"

This reverts commit ce39666.

* Clarify mechanics of version_id in SAS gen

sdk/storage/azure-storage-blob/azure/storage/blob/_shared_access_signature.py

@@ -561,7 +561,10 @@ def generate_blob_sas(
         For example, specifying ip=168.1.5.65 or ip=168.1.5.60-168.1.5.70 on the SAS
         restricts the request to those IP addresses.
     :keyword str version_id:
-        An optional blob version ID. This parameter is only for versioning enabled account
+        An optional blob version ID. This parameter is only applicable for versioning-enabled
+        Storage accounts. Note that the 'versionid' query parameter is not included in the output
+        SAS. Therefore, please provide the 'version_id' parameter to any APIs when using the output
+        SAS to operate on a specific version.
 
         .. versionadded:: 12.4.0
             This keyword argument was introduced in API version '2019-12-12'.