fix: delete cookiefile only with remove_entry

[danielbrunt57]

Add async_remove_entry and move cookiefile deletion from async_unload_entry to async_remove_entry.

[alandtse]

Where are these functions called? It seems weird that the fix for deleting too much is to write a new function remove_entry function. Is this a new HA function? If so, please provide a link to the dev docs or the github showing it was added. This may also require a HA version bump depending on when it was introduced.

[alandtse]

Nevermind, saw it in the linked issue.

[danielbrunt57]

I wish I could figure out how to terminate the http2 connection when the entry is removed.

The closest I can see is the close_callback=http2_close_handler but it's purpose seems to be to try and reconnect it when it closes rather than terminate it, and the await login_obj.close() doesn't end the HTTP2EchoClient process. It persists even after the config entry is removed...