fix(core): Typing in generic + network (#700)

Supports:
https://github.com/testcontainers/testcontainers-python/issues/305
Related : #691  #692 

### Overview
1. Updated Mypy 
2. Add a new dev script to allow easy reporting on Mypy errors (Using it
in the makefile)
4. fix various type errors (all over core)

#### Old
```
                    Error Summary                     
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━┓
┃ File Path                                 ┃ Errors ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━┩
│ core/testcontainers/core/version.py       │ 12     │
│ core/testcontainers/core/docker_client.py │ 14     │
│ core/testcontainers/core/network.py       │ 4      │
│ core/testcontainers/core/image.py         │ 17     │
│ core/testcontainers/core/waiting_utils.py │ 8      │
│ core/testcontainers/core/container.py     │ 20     │
│ core/tests/test_new_docker_api.py         │ 4      │
│ core/tests/test_docker_in_docker.py       │ 2      │
│ core/testcontainers/compose/compose.py    │ 22     │
│ core/testcontainers/compose/__init__.py   │ 2      │
│ core/testcontainers/core/generic.py       │ 1      │
│ core/tests/test_version.py                │ 2      │
│ core/tests/test_ryuk.py                   │ 2      │
│ core/tests/test_registry.py               │ 1      │
│ core/tests/test_network.py                │ 1      │
│ core/tests/test_labels.py                 │ 1      │
│ core/tests/test_image.py                  │ 3      │
│ core/tests/test_docker_client.py          │ 1      │
│ core/tests/conftest.py                    │ 1      │
│ core/tests/test_compose.py                │ 7      │
└───────────────────────────────────────────┴────────┘
Found 125 errors in 20 files.
```
#### New
```
                    Error Summary                     
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━┓
┃ File Path                                 ┃ Errors ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━┩
│ core/testcontainers/core/version.py       │ 12     │
│ core/testcontainers/core/docker_client.py │ 14     │
│ core/testcontainers/core/image.py         │ 17     │
│ core/testcontainers/core/waiting_utils.py │ 8      │
│ core/testcontainers/core/container.py     │ 20     │
│ core/tests/test_new_docker_api.py         │ 4      │
│ core/tests/test_docker_in_docker.py       │ 2      │
│ core/testcontainers/compose/compose.py    │ 22     │
│ core/testcontainers/compose/__init__.py   │ 2      │
│ core/tests/test_version.py                │ 2      │
│ core/tests/test_ryuk.py                   │ 2      │
│ core/tests/test_registry.py               │ 1      │
│ core/tests/test_image.py                  │ 3      │
│ core/tests/test_compose.py                │ 7      │
└───────────────────────────────────────────┴────────┘
Found 116 errors in 14 files.
```

---------

Co-authored-by: David Ankin <daveankin@gmail.com>