feat(tvix/build), add OciBuildService, the old way

This is just patchset 10 of CL10855, before the color_eyre changes,
rebased to the tvix_castore api.

Change-Id: If4b42412ff8568058908cda971ad7d6f2d9f9b7b

---
This provides a build service invoking runc. It can be used by using the
`oci://$path_to_some_tempdir` builder URL for now.

For now, it can be tested as such:

```
BUILD_SERVICE_ADDR=oci://$PWD/bundles target/debug/tvix
let pkgs = (import <nixpkgs> {}); in builtins.readDir pkgs.perl
```

readDir is to actually trigger IO into the store path (which triggers
the builds).

For now it fails due to missing reference scanning (see followup CLs).

Change-Id: I09b40e410114ce69966a41a0e3c33281b859e443
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12526
Autosubmit: yuka <yuka@yuka.dev>
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>

tvix/Cargo.lock

@@ -893,14 +893,38 @@ dependencies = [
  "syn 2.0.76",
 ]
 
+[[package]]
+name = "darling"
+version = "0.14.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b750cb3417fd1b327431a470f388520309479ab0bf5e323505daf0290cd3850"
+dependencies = [
+ "darling_core 0.14.4",
+ "darling_macro 0.14.4",
+]
+
 [[package]]
 name = "darling"
 version = "0.20.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "54e36fcd13ed84ffdfda6f5be89b31287cbb80c439841fe69e04841435464391"
 dependencies = [
- "darling_core",
- "darling_macro",
+ "darling_core 0.20.8",
+ "darling_macro 0.20.8",
+]
+
+[[package]]
+name = "darling_core"
+version = "0.14.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "109c1ca6e6b7f82cc233a97004ea8ed7ca123a9af07a8230878fcfda9b158bf0"
+dependencies = [
+ "fnv",
+ "ident_case",
+ "proc-macro2",
+ "quote",
+ "strsim 0.10.0",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -917,13 +941,24 @@ dependencies = [
  "syn 2.0.76",
 ]
 
+[[package]]
+name = "darling_macro"
+version = "0.14.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4aab4dbc9f7611d8b55048a3a16d2d010c2c8334e46304b40ac1cc14bf3b48e"
+dependencies = [
+ "darling_core 0.14.4",
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "darling_macro"
 version = "0.20.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a668eda54683121533a393014d8692171709ff57a7d61f187b6e782719f8933f"
 dependencies = [
- "darling_core",
+ "darling_core 0.20.8",
  "quote",
  "syn 2.0.76",
 ]
@@ -954,6 +989,37 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "derive_builder"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8d67778784b508018359cbc8696edb3db78160bab2c2a28ba7f56ef6932997f8"
+dependencies = [
+ "derive_builder_macro",
+]
+
+[[package]]
+name = "derive_builder_core"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c11bdc11a0c47bc7d37d582b5285da6849c96681023680b906673c5707af7b0f"
+dependencies = [
+ "darling 0.14.4",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
+[[package]]
+name = "derive_builder_macro"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebcda35c7a396850a55ffeac740804b40ffec779b98fffbb1738f4033f0ee79e"
+dependencies = [
+ "derive_builder_core",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "diff"
 version = "0.1.13"
@@ -1485,6 +1551,18 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "getset"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e45727250e75cc04ff2846a66397da8ef2b3db8e40e0cef4df67950a07621eb9"
+dependencies = [
+ "proc-macro-error",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "gimli"
 version = "0.28.1"
@@ -2452,6 +2530,19 @@ dependencies = [
  "walkdir",
 ]
 
+[[package]]
+name = "oci-spec"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8384f8eff13954bafafba991f1910779020456f9694de25e81a13da5b7de6309"
+dependencies = [
+ "derive_builder",
+ "getset",
+ "serde",
+ "serde_json",
+ "thiserror",
+]
+
 [[package]]
 name = "once_cell"
 version = "1.19.0"
@@ -2827,6 +2918,30 @@ dependencies = [
  "syn 2.0.76",
 ]
 
+[[package]]
+name = "proc-macro-error"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
+dependencies = [
+ "proc-macro-error-attr",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+ "version_check",
+]
+
+[[package]]
+name = "proc-macro-error-attr"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "version_check",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.86"
@@ -3657,7 +3772,7 @@ version = "3.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a8fee4991ef4f274617a51ad4af30519438dacb2f56ac773b08a1922ff743350"
 dependencies = [
- "darling",
+ "darling 0.20.8",
  "proc-macro2",
  "quote",
  "syn 2.0.76",
@@ -4531,13 +4646,22 @@ dependencies = [
 name = "tvix-build"
 version = "0.1.0"
 dependencies = [
+ "anyhow",
+ "blake3",
+ "bstr",
  "bytes",
  "clap",
+ "data-encoding",
+ "futures",
  "itertools 0.12.1",
+ "lazy_static",
  "mimalloc",
+ "oci-spec",
  "prost",
  "prost-build",
  "rstest",
+ "serde_json",
+ "tempfile",
  "thiserror",
  "tokio",
  "tokio-listener",
@@ -4548,6 +4672,7 @@ dependencies = [
  "tvix-castore",
  "tvix-tracing",
  "url",
+ "uuid",
 ]
 
 [[package]]