Remove ListStream type (#14425)

# Description
List values and list streams have the same type (`list<>`). Rather,
streaming is a separate property of the pipeline/command output. This PR
removes the unnecessary `ListStream` type.

# User-Facing Changes
Should be none, except `random dice` now has a more specific output
type.

crates/nu-command/src/database/commands/into_sqlite.rs

@@ -359,7 +359,6 @@ fn nu_value_to_sqlite_type(val: &Value) -> Result<&'static str, ShellError> {
         | Type::Custom(_)
         | Type::Error
         | Type::List(_)
-        | Type::ListStream
         | Type::Range
         | Type::Record(_)
         | Type::Signature

crates/nu-command/src/random/dice.rs

@@ -12,7 +12,7 @@ impl Command for SubCommand {
 
     fn signature(&self) -> Signature {
         Signature::build("random dice")
-            .input_output_types(vec![(Type::Nothing, Type::ListStream)])
+            .input_output_types(vec![(Type::Nothing, Type::list(Type::Int))])
             .allow_variants_without_examples(true)
             .named(
                 "dice",

crates/nu-command/src/system/nu_check.rs

@@ -15,7 +15,6 @@ impl Command for NuCheck {
         Signature::build("nu-check")
             .input_output_types(vec![
                 (Type::String, Type::Bool),
-                (Type::ListStream, Type::Bool),
                 (Type::List(Box::new(Type::Any)), Type::Bool),
             ])
             // type is string to avoid automatically canonicalizing the path