Use readable form for all size and duration options in config file

[evenyag]

What type of enhancement is this?

Configuration, User experience

What does the enhancement do?

There are still many options don't use ReadableSize and ReadableDuration.

grpc

greptimedb/src/frontend/src/service_config/grpc.rs

Lines 24 to 27 in 0a9972a

	// Max gRPC receiving(decoding) message size
	pub max_recv_message_size: usize,
	// Max gRPC sending(encoding) message size
	pub max_send_message_size: usize,

heartbeat

greptimedb/src/servers/src/heartbeat_options.rs

Lines 20 to 23 in 0a9972a

	pub struct HeartbeatOptions {
	pub interval_millis: u64,
	pub retry_interval_millis: u64,
	}

meta client

greptimedb/src/meta-client/src/lib.rs

Lines 22 to 31 in 9e33ddc

	pub struct MetaClientOptions {
	pub metasrv_addrs: Vec<String>,
	pub timeout_millis: u64,
	#[serde(default = "default_heartbeat_timeout_millis")]
	pub heartbeat_timeout_millis: u64,
	#[serde(default = "default_ddl_timeout_millis")]
	pub ddl_timeout_millis: u64,
	pub connect_timeout_millis: u64,
	pub tcp_nodelay: bool,
	}

Implementation challenges

No response

[masonyc]

Hi, I would like to work on this one