Change to async_forward_entry_setups

[Snuffy2]

Describe the bug

A clear and concise description of what the bug is.

2023-02-01 21:06:44.621 WARNING (MainThread) [homeassistant.helpers.frame] Detected integration that called async_setup_platforms instead of awaiting async_forward_entry_setups; this will fail in version 2023.3. Please report issue to the custom integration author for resmed_myair using this method at custom_components/resmed_myair/__init__.py, line 23: hass.config_entries.async_setup_platforms(config_entry, PLATFORMS)

Linked PR to fix

[Snuffy2]

https://developers.home-assistant.io/blog/2022/07/08/config_entry_forwards/

[Justin Dybedahl]

@prestomation I know you don't have the device any longer and you no longer maintain the code. Any chance this and the other PR could be merged into a beta so we could try this out? Thanks.

[Preston Tamkin]

fix with #29