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/conversions/into/binary.rs

@@ -36,6 +36,7 @@ impl Command for SubCommand {
                 (Type::Filesize, Type::Binary),
                 (Type::Date, Type::Binary),
                 (Type::Table(vec![]), Type::Table(vec![])),
+                (Type::Record(vec![]), Type::Record(vec![])),
             ])
             .allow_variants_without_examples(true) // TODO: supply exhaustive examples
             .rest(

crates/nu-command/src/conversions/into/bool.rs

@@ -23,6 +23,7 @@ impl Command for SubCommand {
                 (Type::Bool, Type::Bool),
                 (Type::List(Box::new(Type::Any)), Type::Table(vec![])),
                 (Type::Table(vec![]), Type::Table(vec![])),
+                (Type::Record(vec![]), Type::Record(vec![])),
             ])
             .allow_variants_without_examples(true)
             .rest(

crates/nu-command/src/conversions/into/datetime.rs

@@ -69,6 +69,7 @@ impl Command for SubCommand {
             (Type::String, Type::Date),
             (Type::List(Box::new(Type::String)), Type::List(Box::new(Type::Date))),
             (Type::Table(vec![]), Type::Table(vec![])),
+            (Type::Record(vec![]), Type::Record(vec![])),
         ])
         .allow_variants_without_examples(true)
         .named(

crates/nu-command/src/conversions/into/decimal.rs

@@ -21,6 +21,7 @@ impl Command for SubCommand {
                 (Type::String, Type::Number),
                 (Type::Bool, Type::Number),
                 (Type::Table(vec![]), Type::Table(vec![])),
+                (Type::Record(vec![]), Type::Record(vec![])),
                 (
                     Type::List(Box::new(Type::Any)),
                     Type::List(Box::new(Type::Number)),

crates/nu-command/src/conversions/into/duration.rs

@@ -24,7 +24,9 @@ impl Command for SubCommand {
                 (Type::String, Type::String),
                 (Type::Duration, Type::String),
                 (Type::Table(vec![]), Type::Table(vec![])),
+                (Type::Record(vec![]), Type::Record(vec![])),
             ])
+            .allow_variants_without_examples(true)
             .named(
                 "convert",
                 SyntaxShape::String,

crates/nu-command/src/conversions/into/filesize.rs

@@ -22,6 +22,7 @@ impl Command for SubCommand {
                 (Type::String, Type::Filesize),
                 (Type::Filesize, Type::Filesize),
                 (Type::Table(vec![]), Type::Table(vec![])),
+                (Type::Record(vec![]), Type::Record(vec![])),
                 (
                     Type::List(Box::new(Type::Int)),
                     Type::List(Box::new(Type::Filesize)),

crates/nu-command/src/conversions/into/int.rs

@@ -39,6 +39,7 @@ impl Command for SubCommand {
                 (Type::Duration, Type::Int),
                 (Type::Filesize, Type::Int),
                 (Type::Table(vec![]), Type::Table(vec![])),
+                (Type::Record(vec![]), Type::Record(vec![])),
                 (
                     Type::List(Box::new(Type::String)),
                     Type::List(Box::new(Type::Int)),

crates/nu-command/src/conversions/into/string.rs

@@ -45,6 +45,7 @@ impl Command for SubCommand {
                     Type::List(Box::new(Type::String)),
                 ),
                 (Type::Table(vec![]), Type::Table(vec![])),
+                (Type::Record(vec![]), Type::Record(vec![])),
             ])
             .allow_variants_without_examples(true) // https://github.com/nushell/nushell/issues/7032
             .rest(