Expose propolis' serial console channel in nexus

- Includes updates to progenitor and reqwest 0.11.12 for client support
  for Dropshot websocket channels.
- Literally only passes through the websocket, does not yet include the
  serial output buffering done by its parent GET endpoint.
- Begins migrating sled-agent's propolis-client usage to the new
  progenitor-generated version (oxidecomputer/propolis#206)

Author: lif

Cargo.lock

@@ -16,7 +16,7 @@ hyper = "0.14"
 ipnetwork = "0.20"
 macaddr = { version = "1.0.1", features = [ "serde_std" ] }
 rand = "0.8.4"
-reqwest = { version = "0.11", default-features = false, features = ["rustls-tls", "stream"] }
+reqwest = { version = "0.11.12", default-features = false, features = ["rustls-tls", "stream"] }
 ring = "0.16"
 schemars = { version = "0.8.10", features = [ "chrono", "uuid1" ] }
 serde = { version = "1.0", features = [ "derive" ] }

common/Cargo.toml

@@ -5,7 +5,7 @@ edition = "2021"
 
 [dependencies]
 progenitor-client = { git = "https://github.com/oxidecomputer/progenitor" }
-reqwest = { version = "0.11", features = ["json", "stream", "rustls-tls"] }
+reqwest = { version = "0.11.12", features = ["json", "stream", "rustls-tls"] }
 serde = { version = "1.0", features = ["derive"] }
 slog = "2.7"