chore(3p/sources): Bump channels & overlays

- Adjust to ecl 23.9.9 release

- Regenerate go protos after protoc-gen-go update

- Drop dhall fork which hasn't kept up with 1.42.*

- Address new clippy warnings:

  - Variant naming of Error::ValidationError
  - Simplify .try_into().unwrap()
  - Drop unnecessary identity function
  - Test module must be last in file
  - Drop unused `pub use`

- Update agenix to 0.15.0. Current master has a installCheckPhase that
  doesn't work with C++ Nix 2.3.*:
  a23aa271be (commitcomment-137185861)

Change-Id: Ic29eef20d6fd1362ce1031364a5ca6b4edf195bd
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10615
Reviewed-by: aspen <root@gws.fyi>
Tested-by: BuildkiteCI
Autosubmit: sterni <sternenseemann@systemli.org>

tvix/nix-compat/src/nar/wire/tag.rs

@@ -91,36 +91,6 @@ macro_rules! make {
     };
 }
 
-pub(crate) use make;
-
-#[cfg(test)]
-mod test {
-    use super::super::tag::{self, Tag};
-
-    const TOK_A: [u8; 3] = [0xed, 0xef, 0x1c];
-    const TOK_B: [u8; 3] = [0xed, 0xf0, 0x1c];
-
-    const OFFSET: usize = 1;
-
-    make! {
-        enum Token[OFFSET] {
-            A = TOK_A,
-            B = TOK_B,
-        }
-    }
-
-    #[test]
-    fn example() {
-        assert_eq!(Token::from_u8(0xed), None);
-
-        let tag = Token::from_u8(0xef).unwrap();
-        assert_eq!(tag.as_bytes(), &TOK_A[..]);
-
-        let tag = Token::from_u8(0xf0).unwrap();
-        assert_eq!(tag.as_bytes(), &TOK_B[..]);
-    }
-}
-
 // The following functions are written somewhat unusually,
 // since they're const functions that cannot use iterators.
 
@@ -163,3 +133,33 @@ pub const fn min_of(mut xs: &[usize]) -> usize {
 pub const fn buf_of(xs: &[usize]) -> usize {
     max_of(&[min_of(xs), max_of(xs) - min_of(xs)])
 }
+
+pub(crate) use make;
+
+#[cfg(test)]
+mod test {
+    use super::super::tag::{self, Tag};
+
+    const TOK_A: [u8; 3] = [0xed, 0xef, 0x1c];
+    const TOK_B: [u8; 3] = [0xed, 0xf0, 0x1c];
+
+    const OFFSET: usize = 1;
+
+    make! {
+        enum Token[OFFSET] {
+            A = TOK_A,
+            B = TOK_B,
+        }
+    }
+
+    #[test]
+    fn example() {
+        assert_eq!(Token::from_u8(0xed), None);
+
+        let tag = Token::from_u8(0xef).unwrap();
+        assert_eq!(tag.as_bytes(), &TOK_A[..]);
+
+        let tag = Token::from_u8(0xf0).unwrap();
+        assert_eq!(tag.as_bytes(), &TOK_B[..]);
+    }
+}