Update the autorest.md file to use swagger README instead of json file

[ShivangiReja]

We should be using swagger README files instead of json in autorest.md. For management plane we are using README for all the SDKs but most of the data plane libraries are using json files.

List of data Plane libraries that are using Json as an input-file:
Anomaly Detector
Form Recognizer
Text Analytics
Search
Digital Twins
Communication.Administration
Communication.Chat
Communication.Sms
Security.KeyVault.Administration
Metrics Advisor
Synapse.AccessControl
Synapse.Artifacts
Synapse.Spark
Tables

[christothes]

Tracking this for Tables in #16510

[ShivangiReja]

Tracking issues here:

• Form Recognizer - Form Recognizer: Update the autorest.md file to use README.md as an input instead of swagger json file #18728
• Anomaly Detector - Anomaly Detector: Update the autorest.md file to use README.md as an input instead of swagger json file #18729
• Text Analytics- [Text Analytics] Update the autorest.md file to use README.md as an input instead of swagger json file #18730
• Search - [Search] Update the autorest.md file to use README.md as an input instead of swagger json file #18731
• Digital Twins - [Digital Twins] Update the autorest.md file to use README.md as an input instead of swagger json file #18732
• Communication - [Communication] Update the autorest.md file to use README.md as an input instead of swagger json file #18733
• Keyvault - [Keyvault] Update the autorest.md file to use README.md as an input instead of swagger json file #18734
• Metrics Advisor - [Metrics Advisor] Update the autorest.md file to use README.md as an input instead of swagger json file #18735
• Synapse - [Synapse] Update the autorest.md file to use README.md as an input instead of swagger json file #18736
• Tables - [Tables] Update the autorest.md file to use README.md as an input instead of swagger json file  #18737
• Attestation - [Attestation] Update the autorest.md file to use README.md as an input instead of swagger json file #18739
• Mixed Reality - [Mixed Reality] Update the autorest.md file to use README.md as an input instead of swagger json file #18741
• monitor - [Monitor] Update the autorest.md file to use README.md as an input instead of swagger json file  #18742
• Storage - [Storage] Update the autorest.md file to use README.md as an input instead of swagger json file #18744