[internal-dns] break types-only dependencies to dns-service-client (#…

…6807)

Currently, a number of crates across Omicron use `dns-service-client` just for
the types, leading tools like `ls-apis` to have to make exceptions to handle
them.

To resolve this, follow the pattern we've used in other places, particularly
while breaking dependency loops between API and client crates:

* Introduce a `types` crate, in this case `internal-dns-types`, and move the
  shared types (currently in `dns-server-api`) to the crate. This crate is a
  good place to put config code generally.
* Use the types from `internal-dns-types` everywhere via `replace`
  directives.

As a result of this, the only code that was left in `internal-dns` was the
resolver -- so rename the crate to `internal-dns-resolver` and move that to
`internal-dns/resolver`. Also move the `internal-dns-cli` crate to
`internal-dns/cli`, since that is the general pattern we follow in
Omicron.

As a result of this change, code that just needs the types no longer needs to
depend on `dns-service-client`, allowing us to remove one of the two
`dns-service-client`-related rules. (I believe the other rule can be removed
once all our dependencies have been bumped.)

There are no changes to the output of `cargo xtask ls-apis apis`.

Cargo.toml

@@ -50,8 +50,9 @@ members = [
     "installinator-api",
     "installinator-common",
     "installinator",
-    "internal-dns-cli",
-    "internal-dns",
+    "internal-dns/cli",
+    "internal-dns/resolver",
+    "internal-dns/types",
     "ipcc",
     "key-manager",
     "live-tests",
@@ -173,8 +174,9 @@ default-members = [
     "installinator-api",
     "installinator-common",
     "installinator",
-    "internal-dns-cli",
-    "internal-dns",
+    "internal-dns/cli",
+    "internal-dns/resolver",
+    "internal-dns/types",
     "ipcc",
     "key-manager",
     "live-tests",
@@ -401,7 +403,8 @@ installinator = { path = "installinator" }
 installinator-api = { path = "installinator-api" }
 installinator-client = { path = "clients/installinator-client" }
 installinator-common = { path = "installinator-common" }
-internal-dns = { path = "internal-dns" }
+internal-dns-resolver = { path = "internal-dns/resolver" }
+internal-dns-types = { path = "internal-dns/types" }
 ipcc = { path = "ipcc" }
 ipnet = "2.9"
 itertools = "0.13.0"

clients/dns-service-client/Cargo.toml

@@ -8,10 +8,10 @@ license = "MPL-2.0"
 workspace = true
 
 [dependencies]
-anyhow.workspace = true
 chrono.workspace = true
 expectorate.workspace = true
 http.workspace = true
+internal-dns-types.workspace = true
 progenitor.workspace = true
 reqwest = { workspace = true, features = ["json", "rustls-tls", "stream"] }
 schemars.workspace = true