chore: Change AGPL-licensed crates to GPL (except for collab) (#4231)

- [x] Fill in GPL license text.
- [x] live_kit_client depends on live_kit_server as non-dev dependency,
even though it seems to only be used for tests. Is that an issue?

Release Notes:
- N/A

crates/node_runtime/Cargo.toml

@@ -3,7 +3,7 @@ name = "node_runtime"
 version = "0.1.0"
 edition = "2021"
 publish = false
-license = "AGPL-3.0-only"
+license = "GPL-3.0-only"
 
 
 [lib]

crates/node_runtime/LICENSE-AGPL

@@ -1 +0,0 @@
-../../LICENSE-AGPL

crates/node_runtime/LICENSE-GPL

@@ -0,0 +1 @@
+../../LICENSE-GPL