feat: change log format for runner and operator

[dav1do]

You can now change the operator and runner log format. Currently you can run the binary with keramik-operator --log-format json daemon to change it. The developing_operator page includes an example.

I took the value from the operator cli and then set it globally in the process to be used by anyone. Alternatively, it could be piped through in config/specs (e.g. BootstrapSpec/BootstrapConfig) but it didn't seem like you'd want to set them differently, and having to set multiple places is a bit annoying. As we start operator logs before we start the daemon and get access to the network context, I used the command line option and a global variable. I don't love it and am open to better options, but using the network spec isn't an option as this has to happen before we start reconciling.

I thought I could get the tracing to work with just tracing_subscriber::fmt()::json() and tracing_subscriber::fmt().pretty() but I didn't get the generics right and took the example from rust-ceramic to implement format for fields/events.

It originally had multiple CLI args, but switched to using the one from telemetry every where else. I had to add clap a dependency to common, but it's not optional in the workspace currently so it didn't change anything. I did this in its own commit if we prefer the multiple args option, or if there's a better solution I'm missing.

❯ k logs keramik-operator-5cb74877b6-s55hw -n keramik
{"timestamp":"2024-05-21T02:09:03.050162Z","level":"INFO","fields":{"message":"starting operator"},"target":"keramik_operator"}
{"timestamp":"2024-05-21T02:09:26.627798Z","level":"ERROR","fields":{"message":"reconcile error","err":"ReconcilerFailed(Kube { source: Api(ErrorResponse { status: \"Failure\", message: \"pods \\\"ceramic-0-0\\\" not found\", reason: \"NotFound\", code: 404 }) }, ObjectRef { dyntype: ApiResource { group: \"keramik.3box.io\", version: \"v1alpha1\", api_version: \"keramik.3box.io/v1alpha1\", kind: \"Network\", plural: \"networks\" }, name: \"small\", namespace: None, extra: Extra { resource_version: Some(\"3787284\"), uid: Some(\"8c9199fa-b16b-4474-a6a8-c1ef88ac238f\") } })"},"target":"keramik_operator::network::controller"}
{"timestamp":"2024-05-21T02:09:26.712457Z","level":"ERROR","fields":{"message":"reconcile error","err":"ReconcilerFailed(Kube { source: Api(ErrorResponse { status: \"Failure\", message: \"pods \\\"ceramic-0-0\\\" not found\", reason: \"NotFound\", code: 404 }) }, ObjectRef { dyntype: ApiResource { group: \"keramik.3box.io\", version: \"v1alpha1\", api_version: \"keramik.3box.io/v1alpha1\", kind: \"Network\", plural: \"networks\" }, name: \"small\", namespace: None, extra: Extra { resource_version: None, uid: Some(\"8c9199fa-b16b-4474-a6a8-c1ef88ac238f\") } })"},"target":"keramik_operator::network::controller"}
{"timestamp":"2024-05-21T02:09:31.814035Z","level":"WARN","fields":{"message":"failed to get peer info for cas-ipfs","err":"error sending request for url (http://cas-ipfs-0.cas-ipfs.keramik-small.svc.cluster.local:5001/api/v0/id): error trying to connect: dns error: failed to lookup address information: Name or service not known"},"target":"keramik_operator::network::controller","span":{"object.reason":"error policy requested retry","object.ref":"Network.v1alpha1.keramik.3box.io/small","name":"reconciling object"},"spans":[{"object.reason":"error policy requested retry","object.ref":"Network.v1alpha1.keramik.3box.io/small","name":"reconciling object"}]}