Endpoints displayed in random order

Using Microsoft.Azure.Functions.Worker.Extensions.OpenApi Version="0.8.1-preview"

The [swagger ui](http://../api/swagger/ui) lists the functions/endpoints in a random order. It is not sorting by tag name or by function name.

The corresponding [swagger.json](http://../api/swagger.json) is also unsorted.

Functions are grouping properly by tags but not sorting within the tag groups either.

Cannot upgrade to 1.0.0 due to issue #296

The expected behavior is that functions are sorted by Tag then by Function Name/OperationId.

The current behavior seems to be a random order by Tag then ordered by order of method within source code.

For example:

[OpenApiOperation(operationId: "FunctionA", tags: new[] { "Function Group A" }]
public async Task postFunctionA([HttpTrigger(AuthorizationLevel.Function, "post"] HttpRequestData req, FunctionContext executionContext)
{
...
}

[OpenApiOperation(operationId: "FunctionC", tags: new[] { "Function Group B" }]
public async Task postFunctionC([HttpTrigger(AuthorizationLevel.Function, "post"] HttpRequestData req, FunctionContext executionContext)
{
///
}

[OpenApiOperation(operationId: "FunctionB", tags: new[] { "Function Group B" }]
public async Task postFunctionB([HttpTrigger(AuthorizationLevel.Function, "post"] HttpRequestData req, FunctionContext executionContext)
{
///
}

The above should render as:

Function Group A
-postFunctionA

Function Group B
-postFunctionB
-postFunctionC

Instead it will render as:

Function Group B
-postFunctionC
-postFunctionB

Function Group A
-postFunctionA

Reproduce the issue with the generated swagger.json and Swagger UI using the three functions and OpenApiOperation attributes shown in the report. Trace how tags and operation IDs are ordered during OpenAPI generation; done means both outputs consistently sort tags and then functions by name or operationId, while remaining compatible with version 0.8.1-preview.

Written by the indexing model from the issue text.