Integrate tracing (#6339)

Tracing Integration
- [reference](5bbf1859e9/projects/project-ideas.md (L297))


  - [x] replace slog & log with tracing throughout the codebase
- [x] implement custom crit log
- [x] make relevant changes in the formatter
- [x] replace sloggers
- [x] re-write SSE logging components

cc: @macladson @eserilev

lcli/src/block_root.rs

@@ -32,9 +32,9 @@ use clap_utils::{parse_optional, parse_required};
 use environment::Environment;
 use eth2::{types::BlockId, BeaconNodeHttpClient, SensitiveUrl, Timeouts};
 use eth2_network_config::Eth2NetworkConfig;
-use log::info;
 use std::path::PathBuf;
 use std::time::{Duration, Instant};
+use tracing::info;
 use types::{EthSpec, FullPayload, SignedBeaconBlock};
 
 const HTTP_TIMEOUT: Duration = Duration::from_secs(5);
@@ -102,7 +102,7 @@ pub fn run<E: EthSpec>(
     }
 
     if let Some(block_root) = block_root {
-        info!("Block root is {:?}", block_root);
+        info!(%block_root,"Block root");
     }
 
     Ok(())