[BUG] Remove the requirement for the XML comments on all publicly visible methods.

[nick863]

Library name and version

Engineering system

Describe the bug

Related to comment
We need to keep the CS1591 suppression because otherwise all the custom methods will require separate XML comments.

Expected behavior

Introduction of a new method should not result into error,

Actual behavior

Adding a new method results in multiple errors like
C:\Users\nirovins\eclipse-workspace\azure-sdk-for-net\sdk\ai\Azure.AI.Projects.OpenAI\src\Custom\PromptAgentDefinition.cs(30,57): error CS1591: Missing XML comment for publicly visible type or member 'PromptAgentDefinition.TextOptions'
C:\Users\nirovins\eclipse-workspace\azure-sdk-for-net\sdk\ai\Azure.AI.Projects.OpenAI\src\Custom\ResponseItemExtensions.cs(12,29): error CS1591: Missing XML comment for publicly visible type or member 'ResponseItemExtensions'
C:\Users\nirovins\eclipse-workspace\azure-sdk-for-net\sdk\ai\Azure.AI.Projects.OpenAI\src\Custom\ResponseItemExtensions.cs(14,37): error CS1591: Missing XML comment for publicly visible type or member 'ResponseItemExtensions.AsAgentResponseItem(ResponseItem)'

Reproduction Steps

• Generate a code from typespec.
• Override one of the methods
• Observe the errors.

Environment

No response