Enable handling of otp reports in Elixir logger

The previous setting handle_otp_reports=false didn't have any effect
prior to Elixir 1.19. See
elixir-lang/elixir#14354. We were implicitly
relying on it being set to true in our integration tests.

After upgrading Elixir to v1.19 we know have to actually set it to true
to keep seeing logs originating in OTP.

Author: alco

packages/sync-service/config/runtime.exs

@@ -30,7 +30,7 @@ config :logger, :default_formatter,
 sasl? = env!("ELECTRIC_LOG_OTP_REPORTS", :boolean, false)
 
 config :logger,
-  handle_otp_reports: false,
+  handle_otp_reports: true,
   handle_sasl_reports: sasl?
 
 if config_env() == :test do