[Bug] Dependency injection not works with inherited request class

[kijk2869]

Describe the bug
Injector does not recognize the inherited request class as Sanic request class.

Screenshots
Not applicable

To Reproduce

from sanic import Sanic, Request as SanicRequest


class InheritedRequest(SanicRequest):
    ...


app = Sanic("TEST_SERVER", request_class=InheritedRequest)


class Something:
    async def execute(self):
        ...

async def get_something(request: InheritedRequest):
    return Something


app.ext.add_dependency(Something, get_something)

app.run(port=5000, dev=True)

Expected behavior
The injector should skip the request parameter, so that the error not occurs.

Environment (please complete the following information):

• OS: Windows 10
• Version: Python 3.10 / Sanic 22.3.2 / Sanic-ext 22.3.2

Additional context

  File "C:\Users\<truncated>\lib\site-packages\sanic_ext\extensions\injection\injector.py", line 31, in finalize_injections
    injection_registry.finalize(router_types)
  File "C:\Users\<truncated>\lib\site-packages\sanic_ext\extensions\injection\registry.py", line 32, in finalize
    constructor.prepare(self, allowed_types)
  File "C:\Users\<truncated>\lib\site-packages\sanic_ext\extensions\injection\constructor.py", line 81, in prepare
    raise InitError(
sanic_ext.exceptions.InitError: Unable to resolve dependencies for 'get_something'. Could not find the following dependencies:
  - request: <class '__main__.InheritedRequest'>.
Make sure the dependencies are declared using ext.injection. See https://sanicframework.org/en/plugins/sanic-ext/injection.html#injecting-services for more details.