Apply nightly clippy lints (#9654)

# Description
- A new one is the removal of unnecessary `#` in raw strings without `"`
inside.
-
https://rust-lang.github.io/rust-clippy/master/index.html#/needless_raw_string_hashes
- The automatically applied removal of `.into_iter()` touched several
places where #9648 will change to the use of the record API. If
necessary I can remove them @IanManske to avoid churn with this PR.
- Manually applied `.try_fold` in two places
- Removed a dead `if`
- Manual: Combat rightward-drift with early return

crates/nu-command/src/formats/to/xml.rs

@@ -355,7 +355,7 @@ fn parse_attributes(
     vals: Vec<Value>,
 ) -> Result<IndexMap<String, String>, ShellError> {
     let mut h = IndexMap::new();
-    for (k, v) in cols.into_iter().zip(vals.into_iter()) {
+    for (k, v) in cols.into_iter().zip(vals) {
         if let Value::String { val, .. } = v {
             h.insert(k, val);
         } else {