Changes HashMap to use aHash instead, giving a performance boost. (#9391)

# Description

see https://github.com/nushell/nushell/issues/9390
using `ahash` instead of the default hasher. this will not affect
compile time as we where already building `ahash`.


# User-Facing Changes
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# Tests + Formatting
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crates/nu-parser/src/parse_keywords.rs

@@ -1,4 +1,5 @@
 use crate::parser_path::ParserPath;
+use ahash::{HashMap, HashMapExt, HashSet, HashSetExt};
 use itertools::Itertools;
 use log::trace;
 use nu_path::canonicalize_with;
@@ -11,7 +12,6 @@ use nu_protocol::{
     span, Alias, BlockId, Exportable, Module, ModuleId, ParseError, PositionalArg,
     ResolvedImportPattern, Span, Spanned, SyntaxShape, Type, VarId,
 };
-use std::collections::{HashMap, HashSet};
 use std::ffi::OsStr;
 use std::path::{Path, PathBuf};
 

crates/nu-parser/src/parser.rs

@@ -27,13 +27,10 @@ use crate::parse_keywords::{
     parse_use, parse_where, parse_where_expr, LIB_DIRS_VAR,
 };
 
+use ahash::{HashMap, HashMapExt, HashSet, HashSetExt};
 use itertools::Itertools;
 use log::trace;
-use std::{
-    collections::{HashMap, HashSet},
-    num::ParseIntError,
-    str,
-};
+use std::{num::ParseIntError, str};
 
 #[cfg(feature = "plugin")]
 use crate::parse_keywords::parse_register;