Ignore error on refreshing current session

[tmn]

What kind of change does this PR introduce?

Ignore SessionNotFound error on "refresh session if needed"

What is the current behavior?

gotrue-swift throws and SessionNotFound when session is not found.

What is the new behavior?

Supabase supports tables without RLS and requests to public tables without an auth session. Old behaviour prevents user to request data from database without having a valid auth session.

New behaviour will continue running the request with the application API key.

Additional context

Populate an empty Supabase project with the Countries quick start script and request data from that table:

let countryQuery = client.database.from("countries").select()
let countryResponse = try await countryQuery.execute()

if let data = try? countryResponse.decoded(to: [Country].self) {
    countries = data
}

[grdsdev]

Thanks for that @tmn, this makes a lot of sense.