Fix error status mapping and improve error handling

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At the moment there is a mixup between HTTP error codes and Zoom error codes. That makes it difficult to handle errors properly.

This PR addresses some issues with error mapping and error handling (which also has been described in https://github.com/kyleboe/zoom_rb/issues/464):

• Aligns http error codes to corresponding error classes
  • For http error codes check: https://developers.zoom.us/docs/api/rest/error-definitions/
• Map Zoom error attributes to Error type attributes in order to make it easier to check for specific Zoom error codes

Be aware that this would be a breaking change, because it changes the structur of error messages.