Feature Request: Allow multiple comma- or list-delimited method values per API Gateway event

Q1: Description

Basically, I want to allow an API Gateway endpoint to tolerate exactly two HTTP verbs (GET and POST), but not ANY/"*" (it would appear the latter causes problems with CORS preflight OPTIONS, among other considerations).

It is certainly possible at the moment to do so by duplicating the - http: event as such:

functions:
  function1:
    handler: folder/function1.lambda_handler
    events:
      - http:
          path: /path
          method: GET
      - http:
          path: /path
          method: POST

But I have quite a few functions, and each has a relatively involved CORS setup, so doing so would mean 50+ lines of duplicated YAML.

Q2: Proposed solution

Ideally, I could do either:

    events:
      - http:
          path: /path
          method: GET, POST

or

    events:
      - http:
          path: /path
          method: 
            - GET
            - POST

I realize having the same endpoint accept both verbs - rather than splitting it to two endpoints - is a little weird, bordering on an anti-pattern. But that's where my business logic is taking it.

My env

Your Environment Information ---------------------------
Operating System: darwin
Node Version: 14.17.1
Framework Version: 2.52.1
Plugin Version: 5.4.3
SDK Version: 4.2.5
Components Version: 3.14.0

The issue names no repository file or test. Start by tracing how Serverless Framework parses the http event's method and maps it to API Gateway routes, then compare the comma-delimited and list-valued forms. Done means either supported syntax accepts exactly GET and POST without duplicating the event, with coverage for the supported configuration.