Reduce poll interval for remote config scenarios when it make a big difference

[cbeauchesne]

Following #2848, some time optimization could be made on remote config scenarios , by reducing DD_REMOTE_CONFIG_POLL_INTERVAL_SECONDS (default value is 5s)

• remote_config_mocked_backend_asm_features
• remote_config_mocked_backend_live_debugging
• remote_config_mocked_backend_asm_dd
• remote_config_mocked_backend_asm_features_nocache
• remote_config_mocked_backend_live_debugging_nocache
• remote_config_mocked_backend_asm_dd_nocache

Though, those optimization must be done if and only if it's worthy, as it modifies the behavior of the lib. So, for each of those scenario, we need to get the time we gain, and discuss about the threshold where we accept the change.