Further cleanup of Span::test_data usage + span fixes (#7595)

# Description

Inspired by #7592

For brevity use `Value::test_{string,int,float,bool}`

Includes fixes to commands that were abusing `Span::test_data` in their
implementation. Now the call span is used where possible or the explicit
`Span::unknonw` is used.

## Command fixes
- Fix abuse of `Span::test_data()` in `query_xml`
- Fix abuse of `Span::test_data()` in `term size`
- Fix abuse of `Span::test_data()` in `seq date`
- Fix two abuses of `Span::test_data` in `nu-cli`
- Change `Span::test_data` to `Span::unknown` in `keybindings listen`
- Add proper call span to `registry query`
- Fix span use in `nu_plugin_query`
- Fix span assignment in `select`
- Use `Span::unknown` instead of `test_data` in more places

## Other
- Use `Value::test_int`/`test_float()` consistently
- More `test_string` and `test_bool`
- Fix unused imports


# User-Facing Changes

Some commands may now provide more helpful spans for downstream use in
errors

crates/nu-command/src/formats/from/json.rs

@@ -31,7 +31,7 @@ impl Command for FromJson {
                 description: "Converts json formatted string to table",
                 result: Some(Value::Record {
                     cols: vec!["a".to_string()],
-                    vals: vec![Value::int(1, Span::test_data())],
+                    vals: vec![Value::test_int(1)],
                     span: Span::test_data(),
                 }),
             },
@@ -41,12 +41,9 @@ impl Command for FromJson {
                 result: Some(Value::Record {
                     cols: vec!["a".to_string(), "b".to_string()],
                     vals: vec![
-                        Value::int(1, Span::test_data()),
+                        Value::test_int(1),
                         Value::List {
-                            vals: vec![
-                                Value::int(1, Span::test_data()),
-                                Value::int(2, Span::test_data()),
-                            ],
+                            vals: vec![Value::test_int(1), Value::test_int(2)],
                             span: Span::test_data(),
                         },
                     ],

crates/nu-command/src/formats/from/nuon.rs

@@ -29,7 +29,7 @@ impl Command for FromNuon {
                 description: "Converts nuon formatted string to table",
                 result: Some(Value::Record {
                     cols: vec!["a".to_string()],
-                    vals: vec![Value::int(1, Span::test_data())],
+                    vals: vec![Value::test_int(1)],
                     span: Span::test_data(),
                 }),
             },
@@ -39,12 +39,9 @@ impl Command for FromNuon {
                 result: Some(Value::Record {
                     cols: vec!["a".to_string(), "b".to_string()],
                     vals: vec![
-                        Value::int(1, Span::test_data()),
+                        Value::test_int(1),
                         Value::List {
-                            vals: vec![
-                                Value::int(1, Span::test_data()),
-                                Value::int(2, Span::test_data()),
-                            ],
+                            vals: vec![Value::test_int(1), Value::test_int(2)],
                             span: Span::test_data(),
                         },
                     ],

crates/nu-command/src/formats/from/toml.rs

@@ -29,7 +29,7 @@ impl Command for FromToml {
                 description: "Converts toml formatted string to record",
                 result: Some(Value::Record {
                     cols: vec!["a".to_string()],
-                    vals: vec![Value::int(1, Span::test_data())],
+                    vals: vec![Value::test_int(1)],
                     span: Span::test_data(),
                 }),
             },
@@ -40,12 +40,9 @@ b = [1, 2]' | from toml",
                 result: Some(Value::Record {
                     cols: vec!["a".to_string(), "b".to_string()],
                     vals: vec![
-                        Value::int(1, Span::test_data()),
+                        Value::test_int(1),
                         Value::List {
-                            vals: vec![
-                                Value::int(1, Span::test_data()),
-                                Value::int(2, Span::test_data()),
-                            ],
+                            vals: vec![Value::test_int(1), Value::test_int(2)],
                             span: Span::test_data(),
                         },
                     ],

crates/nu-command/src/formats/from/xml.rs

@@ -200,7 +200,7 @@ mod tests {
     use nu_protocol::{Spanned, Value};
 
     fn string(input: impl Into<String>) -> Value {
-        Value::string(input, Span::test_data())
+        Value::test_string(input)
     }
 
     fn row(entries: IndexMap<String, Value>) -> Value {

crates/nu-command/src/formats/from/yaml.rs

@@ -203,7 +203,7 @@ pub fn get_examples() -> Vec<Example> {
             description: "Converts yaml formatted string to table",
             result: Some(Value::Record {
                 cols: vec!["a".to_string()],
-                vals: vec![Value::int(1, Span::test_data())],
+                vals: vec![Value::test_int(1)],
                 span: Span::test_data(),
             }),
         },