Add telemetry backend support for dispute tracking

[sandreim]

A nice enhancement to the dispute tracker is to be able to get additional information about dispute initiators, like hw information and OS. This would save a lot of time when trying to figure out who initiated disputes and why.

pub struct SysInfo {
	/// The exact CPU model.
	pub cpu: Option<String>,
	/// The total amount of memory, in bytes.
	pub memory: Option<u64>,
	/// The number of physical CPU cores.
	pub core_count: Option<u32>,
	/// The Linux kernel version.
	pub linux_kernel: Option<String>,
	/// The exact Linux distribution used.
	pub linux_distro: Option<String>,
	/// Whether the node's running under a virtual machine.
	pub is_virtual_machine: Option<bool>,
}

We just need to:

• add option to specify a telemetry server
• when configured, connect and search for validators network_id which should by address we have from chain
• fetch the additional information that is sent when the connection to telemetry backend is made, see below

pub struct ConnectionMessage {
	/// Node's name.
	pub name: String,
	/// Node's implementation.
	pub implementation: String,
	/// Node's version.
	pub version: String,
	/// Node's configuration.
	pub config: String,
	/// Node's chain.
	pub chain: String,
	/// Node's genesis hash.
	pub genesis_hash: String,
	/// Node is an authority.
	pub authority: bool,
	/// Node's startup time.
	pub startup_time: String,
	/// Node's network ID.
	pub network_id: String,

	/// Node's OS.
	pub target_os: String,

	/// Node's ISA.
	pub target_arch: String,

	/// Node's target platform ABI or libc.
	pub target_env: String,

	/// Node's software and hardware information.
	pub sysinfo: Option<SysInfo>,
}