Resolve various type errors and do some pythonic refactoring of the codebase

[pantheraleo-7]

Partly inspired by the edit of #1177 (Comment)

Type errors resolved in:

1. close

• Sets the camera_ctrl_info to an empty dict, hence keeping the same type. This approach could also be seen in _reset_flags L297
• Sets the *_configuration properties to empty CameraConfiguration objects, hence keeping the same type.

2. __init__

• Initialise the *_configuration_ attributes instead of setting the *_configuration properties which uses the *_configuration_ attributes under the hood without properly initialising them.

Refactors done in:

1. _initialize_camera

• It only ever returned True or raised RuntimeError, so using a bool return type doesn't make sense and is non-pythonic. The downstream usage by _open_camera expects a return value of False in case of failure, but False is never returned.

2. _open_camera

• Now it actually catches the error.
• Earlier when _initialize_camera returned True, the if block was skipped. In the failure case of _initialize_camera, the error was propagated, the if block never got the chance to execute.