Migrate to pull based configuration retrieval #986

Job	Run time
static analysis (Elixir 1.15.x \| Erlang/OTP 25.x)	23s
mix test (Elixir 1.13.x \| Erlang/OTP 22.x)	10m 26s
mix test (Elixir 1.13.x \| Erlang/OTP 23.x)	12m 15s
mix test (Elixir 1.13.x \| Erlang/OTP 24.x)	4m 43s
mix test (Elixir 1.13.x \| Erlang/OTP 25.x)	4m 22s
mix test (Elixir 1.14.x \| Erlang/OTP 23.x)	11m 24s
mix test (Elixir 1.14.x \| Erlang/OTP 24.x)	6m 53s
mix test (Elixir 1.14.x \| Erlang/OTP 25.x)	4m 12s
mix test (Elixir 1.15.x \| Erlang/OTP 24.x)	58s
mix test (Elixir 1.15.x \| Erlang/OTP 25.x)	7m 20s
mix test windows (Elixir 1.13.x \| Erlang/OTP 22.x)	8m 1s
mix test windows (Elixir 1.13.x \| Erlang/OTP 23.x)	8m 53s
mix test windows (Elixir 1.13.x \| Erlang/OTP 24.x)	6m 38s
mix test windows (Elixir 1.13.x \| Erlang/OTP 25.x)	6m 17s
mix test windows (Elixir 1.14.x \| Erlang/OTP 23.x)	8m 25s
mix test windows (Elixir 1.14.x \| Erlang/OTP 24.x)	7m 35s
mix test windows (Elixir 1.14.x \| Erlang/OTP 25.x)	5m 52s
mix test windows (Elixir 1.15.x \| Erlang/OTP 24.x)	6m 52s
mix test windows (Elixir 1.15.x \| Erlang/OTP 25.x)	9m 20s
	2h 10m 49s

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