1.57.0 lints (#2850)

## Issue Addressed

New rust lints

## Proposed Changes

- Boxing some enum variants
- removing some unused fields (is the validator lockfile unused? seemed so to me)

## Additional Info

- some error fields were marked as dead code but are logged out in areas
- left some dead fields in our ef test code because I assume they are useful for debugging?

Co-authored-by: realbigsean <seananderson33@gmail.com>

common/lockfile/src/lib.rs

@@ -11,7 +11,7 @@ use std::path::{Path, PathBuf};
 /// outage) caused the lockfile not to be deleted.
 #[derive(Debug)]
 pub struct Lockfile {
-    file: File,
+    _file: File,
     path: PathBuf,
     file_existed: bool,
 }
@@ -43,7 +43,7 @@ impl Lockfile {
             _ => LockfileError::IoError(path.clone(), e),
         })?;
         Ok(Self {
-            file,
+            _file: file,
             path,
             file_existed,
         })