Update default logging level from WARN to INFO

[dannycjones]

Today, Mountpoint uses WARN logging by default (and also disabled CRT logging entirely as it is noisy for our use case).

mountpoint-s3/mountpoint-s3/src/cli.rs

Lines 498 to 526 in 76c3600

	/// Generates a logging configuration based on the CLI arguments.
	///
	/// This includes random string generation which can change with each invocation,
	/// so once created the [LoggingConfig] should be cloned if another owned copy is required.
	fn make_logging_config(&self) -> LoggingConfig {
	let default_filter = if self.no_log {
	String::from("off")
	} else {
	let mut filter = if self.debug {
	String::from("debug")
	} else {
	String::from("warn")
	};
	let crt_verbosity = if self.debug_crt { "debug" } else { "off" };
	filter.push_str(&format!(",{}={}", AWSCRT_LOG_TARGET, crt_verbosity));
	if self.log_metrics {
	filter.push_str(&format!(",{}=info", metrics::TARGET_NAME));
	}
	filter
	};
	let log_file = self.log_directory.as_ref().map(|dir| prepare_log_file_name(dir));
	LoggingConfig {
	log_file,
	log_to_stdout: self.foreground,
	default_filter,
	}
	}

Instead, we should have INFO logging by default so that that you can see messages such as when the mount occurred successfully and where, even where users may capture logs without --debug specified.

This isn't as simple as changing one line of code. For this issue, we should review where we perform INFO logging in Mountpoint, and downgrade or adjust if necessary. For example, we should ensure that metric logging is turned off or downgraded when the customer does not specify --log-metrics.