'Modernize' the OTEL integration, as there are a lot of breaking changes

* OTEL enabled by default, OTEL drives all intrumentation
* Metrics / logs can now also be exported by OTEL, not just traces
* Remove flame, as it's a dependency nightmare

Signed-off-by: Ryan <ryan.roberts@btp.works>

Author: ryan-s-roberts

.cargo/config.toml

@@ -7,7 +7,7 @@ linker = "x86_64-linux-gnu-gcc"
 [http]
 timeout = 30                # timeout for each HTTP request, in seconds
 low-speed-limit = 10        # network timeout threshold (bytes/sec)
-multiplexing = false
+multiplexing = true
 
 [net]
 retry = 3