Box ShellError in Value::Error (#8375)

# Description

Our `ShellError` at the moment has a `std::mem::size_of<ShellError>` of
136 bytes (on AMD64). As a result `Value` directly storing the struct
also required 136 bytes (thanks to alignment requirements).

This change stores the `Value::Error` `ShellError` on the heap.

Pro:
- Value now needs just 80 bytes
- Should be 1 cacheline less (still at least 2 cachelines)

Con:
- More small heap allocations when dealing with `Value::Error`
  - More heap fragmentation
  - Potential for additional required memcopies

# Further code changes

Includes a small refactor of `try` due to a type mismatch in its large
match.

# User-Facing Changes

None for regular users.

Plugin authors may have to update their matches on `Value` if they use
`nu-protocol`

Needs benchmarking to see if there is a benefit in real world workloads.
**Update** small improvements in runtime for workloads with high volume
of values. Significant reduction in maximum resident set size, when many
values are held in memory.

# Tests + Formatting

crates/nu-command/src/network/url/build_query.rs

@@ -98,7 +98,7 @@ fn to_url(input: PipelineData, head: Span) -> Result<PipelineData, ShellError> {
                 }
             }
             // Propagate existing errors
-            Value::Error { error } => Err(error),
+            Value::Error { error } => Err(*error),
             other => Err(ShellError::UnsupportedInput(
                 "Expected a table from pipeline".to_string(),
                 "value originates from here".into(),

crates/nu-command/src/network/url/encode.rs

@@ -100,12 +100,12 @@ fn action_all(input: &Value, _arg: &CellPathOnlyArgs, head: Span) -> Value {
         }
         Value::Error { .. } => input.clone(),
         _ => Value::Error {
-            error: ShellError::OnlySupportsThisInputType {
+            error: Box::new(ShellError::OnlySupportsThisInputType {
                 exp_input_type: "string".into(),
                 wrong_type: input.get_type().to_string(),
                 dst_span: head,
                 src_span: input.expect_span(),
-            },
+            }),
         },
     }
 }
@@ -121,12 +121,12 @@ fn action(input: &Value, _arg: &CellPathOnlyArgs, head: Span) -> Value {
         }
         Value::Error { .. } => input.clone(),
         _ => Value::Error {
-            error: ShellError::OnlySupportsThisInputType {
+            error: Box::new(ShellError::OnlySupportsThisInputType {
                 exp_input_type: "string".into(),
                 wrong_type: input.get_type().to_string(),
                 dst_span: head,
                 src_span: input.expect_span(),
-            },
+            }),
         },
     }
 }

crates/nu-command/src/network/url/join.rs

@@ -106,7 +106,7 @@ impl Command for SubCommand {
 
                     url_components?.to_url(span)
                 }
-                Value::Error { error } => Err(error),
+                Value::Error { error } => Err(*error),
                 other => Err(ShellError::UnsupportedInput(
                     "Expected a record from pipeline".to_string(),
                     "value originates from here".into(),
@@ -164,7 +164,7 @@ impl UrlComponents {
                     port: Some(val),
                     ..self
                 }),
-                Value::Error { error } => Err(error),
+                Value::Error { error } => Err(*error),
                 other => Err(ShellError::IncompatibleParametersSingle {
                     msg: String::from(
                         "Port parameter should be an unsigned integer or a string representing it",
@@ -211,7 +211,7 @@ impl UrlComponents {
                         ..self
                     })
                 }
-                Value::Error { error } => Err(error),
+                Value::Error { error } => Err(*error),
                 other => Err(ShellError::IncompatibleParametersSingle {
                     msg: String::from("Key params has to be a record"),
                     span: other.expect_span(),