Add error messages and headers in response for failed requests on the s3 endpoint

[surajmn1]

1. when the user sends an invalid bucket name or path name , this must be included as a error message in the failed response . The below error in the server logs The specified bucket does not exist must be included in the failed response message .
   expected sample error response -

{
    "status": 422 , // http status
    "details":{
        "field":"s3_bucket" ,  // JSON field which errored
        "message":"specified bucket does not exist" // error message to be shown in form
    }
}

Server logs -

metafacts-server_1  | ERROR:    Exception in ASGI application
metafacts-server_1  | Traceback (most recent call last):
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/uvicorn/protocols/http/httptools_impl.py", line 390, in run_asgi
metafacts-server_1  |     result = await app(self.scope, self.receive, self.send)
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/uvicorn/middleware/proxy_headers.py", line 45, in __call__
metafacts-server_1  |     return await self.app(scope, receive, send)
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/fastapi/applications.py", line 208, in __call__
metafacts-server_1  |     await super().__call__(scope, receive, send)
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/starlette/applications.py", line 112, in __call__
metafacts-server_1  |     await self.middleware_stack(scope, receive, send)
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/starlette/middleware/errors.py", line 181, in __call__
metafacts-server_1  |     raise exc
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/starlette/middleware/errors.py", line 159, in __call__
metafacts-server_1  |     await self.app(scope, receive, _send)
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/starlette/middleware/cors.py", line 92, in __call__
metafacts-server_1  |     await self.simple_response(scope, receive, send, request_headers=headers)
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/starlette/middleware/cors.py", line 147, in simple_response
metafacts-server_1  |     await self.app(scope, receive, send)
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/starlette/exceptions.py", line 82, in __call__
metafacts-server_1  |     raise exc
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/starlette/exceptions.py", line 71, in __call__
metafacts-server_1  |     await self.app(scope, receive, sender)
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/starlette/routing.py", line 656, in __call__
metafacts-server_1  |     await route.handle(scope, receive, send)
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/starlette/routing.py", line 259, in handle
metafacts-server_1  |     await self.app(scope, receive, send)
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/starlette/routing.py", line 61, in app
metafacts-server_1  |     response = await func(request)
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/fastapi/routing.py", line 226, in app
metafacts-server_1  |     raw_response = await run_endpoint_function(
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/fastapi/routing.py", line 159, in run_endpoint_function
metafacts-server_1  |     return await dependant.call(**values)
metafacts-server_1  |   File "/app/./app/api/api_v1/routers/meta_data.py", line 71, in get_meta_data_from_s3
metafacts-server_1  |     meta_data = await create_meta_data_for_s3_bucket(
metafacts-server_1  |   File "/app/./app/utils/meta_data.py", line 124, in create_meta_data_for_s3_bucket
metafacts-server_1  |     tasks = [
metafacts-server_1  |   File "/app/./app/utils/meta_data.py", line 124, in <listcomp>
metafacts-server_1  |     tasks = [
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/boto3/resources/collection.py", line 81, in __iter__
metafacts-server_1  |     for page in self.pages():
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/boto3/resources/collection.py", line 171, in pages
metafacts-server_1  |     for page in pages:
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/botocore/paginate.py", line 269, in __iter__
metafacts-server_1  |     response = self._make_request(current_kwargs)
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/botocore/paginate.py", line 357, in _make_request
metafacts-server_1  |     return self._method(**current_kwargs)
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/botocore/client.py", line 508, in _api_call
metafacts-server_1  |     return self._make_api_call(operation_name, kwargs)
metafacts-server_1  |   File "/usr/local/lib/python3.9/site-packages/botocore/client.py", line 915, in _make_api_call
metafacts-server_1  |     raise error_class(parsed_response, operation_name)
metafacts-server_1  | botocore.errorfactory.NoSuchBucket: An error occurred (NoSuchBucket) when calling the ListObjects operation: The specified bucket does not exist

2. The response headers of a failed request are not the same as a successful request this is causing errors in the front end . i think it is mostly due to the cors headers not being included in a failed request .

response headers received for successful request -

access-control-allow-credentials: true
access-control-allow-origin: *
content-length: 928
content-type: application/json
date: Tue, 29 Nov 2022 06:42:23 GMT
server: uvicorn

response headers received for failed request -

content-length: 2707
content-type: text/plain; charset=utf-8
date: Tue, 29 Nov 2022 06:43:17 GMT
server: uvicorn