Fix signatures for cellpath access of records (#9793)

# Description
The same procedure as for #9778 repeated for records.

# User-Facing Changes
Commands that directly supported applying their work directly to record
fields via cell paths, that worked before #9680 will now work again

# Tests + Formatting
Tried to limit the need to add new `.allow_variants_without_examples()`
by adjusting or adding tests to also use some records with access.

crates/nu-command/src/hash/generic_digest.rs

@@ -57,6 +57,7 @@ where
                 (Type::String, Type::String),
                 (Type::String, Type::Binary),
                 (Type::Table(vec![]), Type::Table(vec![])),
+                (Type::Record(vec![]), Type::Record(vec![])),
             ])
             .allow_variants_without_examples(true)
             .switch(