Replace Ruby-level error rewrite with fix at source in codeowners-rs

Instead of rescuing RuntimeError in validate! and doing a fragile
gsub on the error message string, pass executable_name to RunConfig
so codeowners-rs generates the correct message directly.

This requires a companion change in codeowners-rs that changes
executable_name to hold the full command (e.g. "codeowners generate")
rather than just the binary name, so the format string no longer
hardcodes the " generate" subcommand.

Author: dduugg

ext/code_ownership/src/lib.rs

@@ -116,7 +116,7 @@ fn build_run_config() -> RunConfig {
         codeowners_file_path: None,
         config_path,
         no_cache: false,
-        executable_name: None,
+        executable_name: Some("bin/codeownership validate".to_string()),
     }
 }
 

lib/code_ownership.rb

@@ -231,11 +231,6 @@ def self.validate!(
     else
       ::RustCodeOwners.validate(files)
     end
-  rescue RuntimeError => e
-    raise e.message.gsub(
-      'Run `codeowners generate` to update the CODEOWNERS file',
-      'Run `bin/codeownership validate` to update the CODEOWNERS file'
-    )
   end
 
   # Removes the file annotation (e.g., "# @team TeamName") from a file.

lib/code_ownership/code_ownership.bundle

@@ -555,20 +555,4 @@
       end
     end
   end
-
-  describe '.validate!' do
-    context 'when RustCodeOwners raises a codeowners-rs error about the CODEOWNERS file being out of date' do
-      it 'rewrites the error message to reference bin/codeownership validate' do
-        allow(RustCodeOwners).to receive(:validate).and_raise(
-          RuntimeError,
-          "CODEOWNERS out of date. Run `codeowners generate` to update the CODEOWNERS file"
-        )
-
-        expect { CodeOwnership.validate!(autocorrect: false) }.to raise_error(
-          RuntimeError,
-          "CODEOWNERS out of date. Run `bin/codeownership validate` to update the CODEOWNERS file"
-        )
-      end
-    end
-  end
 end