Documentation fixes & additions

[Daraan]

Description

Included in this PR are

Doc changes

1. Rolled back two changes from changed get_required_files docs #7763:

   1. Re added "identifiers" in this docstring, as the sentence is incomplete currently.

      - Defines the of each GBuffer texture (See the method 
      + Defines the identifiers of each GBuffer texture (See the method 

   2. Removed the accidentally re added reference to the removed carla.Sensor.is_listening property. See Corrected information that Sensor.is_listening is (currently) a method #7439

2. fixes of spelling mistakes (docstring and documentation)

3. Corrected wrong literal wrapping instead of linking in

[old:] Defines the of each GBuffer texture (See the method [carla.Sensor.listen_to_gbuffer](#carla.Sensor.listen_to_gbuffer)).

5. Added Missing __init__ documentation for OpendriveGenerationParameters
6. Client.replay_file: replay_sensors was not declared as default value
7. World.[try_]spawn_actor parameter is named attachment_type and not attachment
8. Added documentation for Transform.inverse_transform from Added inverse transform #7999
9. added WorldSnapshot.elapsed_seconds to API description.
10. Fixed missing/wrong parameter for Client.apply_batch[_sync]

Needs decision:

• TrafficManager.set_boundaries_respawn_dormant_vehicles has no default values. Current default values are annotations that describe the bounds but are not really default values. I am not sure how to address this.

Changes in non-documentation files:

1. Added space after # Heading when docs are generated #Python API references -> # Python API references to be correct markdown. I am not sure if this is intentionally or an old oversight, but haven't seen anything where this could be relevant
2. Changed in python examples: on_world_tick(self, timestamp -> world_snapshot) to better reflect correct API usage.

Where has this been tested?

• Platform(s): Ubuntu
• Python version(s): 3.7 & 3.10 (should be irrelevant)
• Unreal Engine version(s): 4.26

Possible Drawbacks

• Does 4 have any side effects?

Concerning 11): Are there sideeffects to consider with the parameter renaming of def on_world_tick(self, timestamp -> world_snapshot): in the examples?

Note:

Currently pending changes to snippets and blueprint library (bp_libarary.md) from make PythonAPI.docs not included

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This change is 

[Daraan]

@PabloVD
Mind to give it a look, there are still some flaws in the docs. While this PR is now a bit dated i think all / most does still apply. Mind to take a look what potentially needs chaining now?

[glopezdiest]

I've accepted the PR. This PR brings many great changes to the docs, so let's merge it first and fix the outdated things on another PR.

Thanks you very much for the updates. We'll merge it once the test finish