Add 2021-05-01 ARM API version for Synapse RP (Azure#14605)

* Adds base for updating Microsoft.Synapse from version stable/2021-03-01 to version 2021-05-01

* Updates readme

* Updates API version in new specs and examples

* Added 2021-05-01 version to Synapse RP ARM API spec

* Fixed spellcheck and prettier checks

* Fixed spellchecks

* Add get pec api

Co-authored-by: Surya Prakash <n.suryap@gmail.com>
Co-authored-by: Surya <sunagesw@microsoft.com>

custom-words.txt

@@ -908,6 +908,7 @@ isdirectory
 isfolder
 ishostingenvironmentnameavailable
 ishostnameavailable
+isIdentityCertExprired
 isnullable
 isochrone
 isordered

specification/synapse/data-plane/Microsoft.Synapse/preview/2019-06-01-preview/entityTypes/Dataset.json

@@ -716,16 +716,16 @@
     },
     "ParquetCompressionCodecEnum": {
       "type": "string",
-        "enum": [
-          "none",
-          "gzip",
-          "snappy",
-          "lzo"
-        ],
-        "x-ms-enum": {
-          "name": "ParquetCompressionCodecEnum",
-          "modelAsString": true
-        }
+      "enum": [
+        "none",
+        "gzip",
+        "snappy",
+        "lzo"
+      ],
+      "x-ms-enum": {
+        "name": "ParquetCompressionCodecEnum",
+        "modelAsString": true
+      }
     },
     "DelimitedTextDataset": {
       "x-ms-discriminator-value": "DelimitedText",