Boxes record for smaller Value enum. (#12252)

<!--
if this PR closes one or more issues, you can automatically link the PR
with
them by using one of the [*linking
keywords*](https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword),
e.g.
- this PR should close #xxxx
- fixes #xxxx

you can also mention related issues, PRs or discussions!
-->

# Description
<!--
Thank you for improving Nushell. Please, check our [contributing
guide](../CONTRIBUTING.md) and talk to the core team before making major
changes.

Description of your pull request goes here. **Provide examples and/or
screenshots** if your changes affect the user experience.
-->
Boxes `Record` inside `Value` to reduce memory usage, `Value` goes from
`72` -> `56` bytes after this change.
# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->

# Tests + Formatting
<!--
Don't forget to add tests that cover your changes.

Make sure you've run and fixed any issues with these commands:

- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used` to
check that you're using the standard code style
- `cargo test --workspace` to check that all tests pass (on Windows make
sure to [enable developer
mode](https://learn.microsoft.com/en-us/windows/apps/get-started/developer-mode-features-and-debugging))
- `cargo run -- -c "use std testing; testing run-tests --path
crates/nu-std"` to run the tests for the standard library

> **Note**
> from `nushell` you can also use the `toolkit` as follows
> ```bash
> use toolkit.nu # or use an `env_change` hook to activate it
automatically
> toolkit check pr
> ```
-->

# After Submitting
<!-- If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.
-->

crates/nu-table/src/types/collapse.rs

@@ -52,17 +52,19 @@ fn colorize_value(value: &mut Value, config: &Config, style_computer: &StyleComp
             // Take ownership of the record and reassign to &mut
             // We do this to have owned keys through `.into_iter`
             let record = std::mem::take(val);
-            *val = record
-                .into_iter()
-                .map(|(mut header, mut val)| {
-                    colorize_value(&mut val, config, style_computer);
+            *val = Box::new(
+                record
+                    .into_iter()
+                    .map(|(mut header, mut val)| {
+                        colorize_value(&mut val, config, style_computer);
 
-                    if let Some(color) = style.color_style {
-                        header = color.paint(header).to_string();
-                    }
-                    (header, val)
-                })
-                .collect::<Record>();
+                        if let Some(color) = style.color_style {
+                            header = color.paint(header).to_string();
+                        }
+                        (header, val)
+                    })
+                    .collect::<Record>(),
+            );
         }
         Value::List { vals, .. } => {
             for val in vals {

crates/nu-table/src/unstructured_table.rs

@@ -90,7 +90,7 @@ fn build_table(
 
 fn convert_nu_value_to_table_value(value: Value, config: &Config) -> TableValue {
     match value {
-        Value::Record { val, .. } => build_vertical_map(val, config),
+        Value::Record { val, .. } => build_vertical_map(*val, config),
         Value::List { vals, .. } => {
             let rebuild_array_as_map = is_valid_record(&vals) && count_columns_in_record(&vals) > 0;
             if rebuild_array_as_map {