Dbg backend for debugger #1014

Job	Run time
static analysis (Elixir 1.15.x \| Erlang/OTP 25.x)	19s
mix test (Elixir 1.13.x \| Erlang/OTP 22.x)	1m 13s
mix test (Elixir 1.13.x \| Erlang/OTP 23.x)	1m 22s
mix test (Elixir 1.13.x \| Erlang/OTP 24.x)	1m 15s
mix test (Elixir 1.13.x \| Erlang/OTP 25.x)	1m 32s
mix test (Elixir 1.14.x \| Erlang/OTP 23.x)	1m 46s
mix test (Elixir 1.14.x \| Erlang/OTP 24.x)	1m 30s
mix test (Elixir 1.14.x \| Erlang/OTP 25.x)	1m 36s
mix test (Elixir 1.15.x \| Erlang/OTP 24.x)	1m 18s
mix test (Elixir 1.15.x \| Erlang/OTP 25.x)	1m 27s
mix test windows (Elixir 1.13.x \| Erlang/OTP 22.x)	2m 4s
mix test windows (Elixir 1.13.x \| Erlang/OTP 23.x)	2m 32s
mix test windows (Elixir 1.13.x \| Erlang/OTP 24.x)	2m 34s
mix test windows (Elixir 1.13.x \| Erlang/OTP 25.x)	2m 32s
mix test windows (Elixir 1.14.x \| Erlang/OTP 23.x)	2m 44s
mix test windows (Elixir 1.14.x \| Erlang/OTP 24.x)	2m 19s
mix test windows (Elixir 1.14.x \| Erlang/OTP 25.x)	2m 20s
mix test windows (Elixir 1.15.x \| Erlang/OTP 24.x)	2m 27s
mix test windows (Elixir 1.15.x \| Erlang/OTP 25.x)	2m 9s
	34m 59s

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