chore(tvix/[ca]store): allow building without tonic-reflection

- rename the feature to `tonic-reflection` in both tvix-store and tvix-
   castore.
 - set it to disabled in tvix-castore by default
 - enable it in tvix-store, and pull in tvix-castore with the feature
   enabled.

Change-Id: Ie22833d85569502cae55812f6eeb17a9c15b9e2c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9472
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Reviewed-by: raitobezarius <tvl@lahfa.xyz>

tvix/castore/Cargo.toml

@@ -37,5 +37,5 @@ tempfile = "3.3.0"
 tonic-mock = { git = "https://github.com/brainrake/tonic-mock", branch = "bump-dependencies" }
 
 [features]
-default = ["reflection"]
-reflection = ["tonic-reflection"]
+default = []
+tonic-reflection = ["dep:tonic-reflection"]

tvix/castore/build.rs

@@ -4,7 +4,7 @@ fn main() -> Result<()> {
     #[allow(unused_mut)]
     let mut builder = tonic_build::configure();
 
-    #[cfg(feature = "reflection")]
+    #[cfg(feature = "tonic-reflection")]
     {
         let out_dir = std::path::PathBuf::from(std::env::var("OUT_DIR").unwrap());
         let descriptor_path = out_dir.join("tvix.castore.v1.bin");

tvix/castore/src/proto/mod.rs

@@ -16,7 +16,7 @@ use crate::B3Digest;
 
 tonic::include_proto!("tvix.castore.v1");
 
-#[cfg(feature = "reflection")]
+#[cfg(feature = "tonic-reflection")]
 /// Compiled file descriptors for implementing [gRPC
 /// reflection](https://github.com/grpc/grpc/blob/master/doc/server-reflection.md) with e.g.
 /// [`tonic_reflection`](https://docs.rs/tonic-reflection).