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

beacon_node/beacon_chain/tests/capella.rs

@@ -40,7 +40,6 @@ async fn base_altair_bellatrix_capella() {
 
     let harness = BeaconChainHarness::builder(E::default())
         .spec(spec.into())
-        .logger(logging::test_logger())
         .deterministic_keypairs(VALIDATOR_COUNT)
         .fresh_ephemeral_store()
         .mock_execution_layer()