Reduced LOC by replacing several instances of Value::Int {}, Value::Float{}, Value::Bool {}, and Value::String {} with Value::int(), Value::float(), Value::boolean() and Value::string() (#7412)

# Description

While perusing Value.rs, I noticed the `Value::int()`, `Value::float()`,
`Value::boolean()` and `Value::string()` constructors, which seem
designed to make it easier to construct various Values, but which aren't
used often at all in the codebase. So, using a few find-replaces
regexes, I increased their usage. This reduces overall LOC because
structures like this:
```
Value::Int {
  val: a,
  span: head
}
```
are changed into
```
Value::int(a, head)
```
and are respected as such by the project's formatter.
There are little readability concerns because the second argument to all
of these is `span`, and it's almost always extremely obvious which is
the span at every callsite.

# User-Facing Changes

None.

# 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 -A
clippy::needless_collect` to check that you're using the standard code
style
- `cargo test --workspace` to check that all tests pass

# 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-protocol/tests/test_value.rs

@@ -3,18 +3,9 @@ use nu_protocol::{Span, Value};
 #[test]
 fn test_comparison_nothing() {
     let values = vec![
-        Value::Int {
-            val: 1,
-            span: Span::test_data(),
-        },
-        Value::String {
-            val: "string".into(),
-            span: Span::test_data(),
-        },
-        Value::Float {
-            val: 1.0,
-            span: Span::test_data(),
-        },
+        Value::int(1, Span::test_data()),
+        Value::string("string", Span::test_data()),
+        Value::float(1.0, Span::test_data()),
     ];
 
     let nothing = Value::Nothing {