Use Record APIs in nu-protocol/nu-engine (#10917)

# Description
Consequences of #10841

This does not yet make the assumption that columns are always
duplicated. Follow the existing logic here

- Use saner record API in `nu-engine/src/eval.rs`
- Use checked record construction in `nu-engine/src/scope.rs`
- Use `values` iterator in `nu-engine/src/scope.rs`
- Use `columns` iterator in `nu_engine::get_columns()`
- Start using record API in `value/mod.rs`
- Use `.insert` in `eval_const.rs` Record code
- Record API for `eval_const.rs` table code

# User-Facing Changes
None

# Tests + Formatting
None

crates/nu-protocol/src/value/mod.rs

@@ -3113,7 +3113,7 @@ impl Value {
             }
             (lhs, Value::List { vals: rhs, .. }) => Ok(Value::bool(rhs.contains(lhs), span)),
             (Value::String { val: lhs, .. }, Value::Record { val: rhs, .. }) => {
-                Ok(Value::bool(rhs.cols.contains(lhs), span))
+                Ok(Value::bool(rhs.contains(lhs), span))
             }
             (Value::String { .. } | Value::Int { .. }, Value::CellPath { val: rhs, .. }) => {
                 let val = rhs.members.iter().any(|member| match (self, member) {
@@ -3161,7 +3161,7 @@ impl Value {
             }
             (lhs, Value::List { vals: rhs, .. }) => Ok(Value::bool(!rhs.contains(lhs), span)),
             (Value::String { val: lhs, .. }, Value::Record { val: rhs, .. }) => {
-                Ok(Value::bool(!rhs.cols.contains(lhs), span))
+                Ok(Value::bool(!rhs.contains(lhs), span))
             }
             (Value::String { .. } | Value::Int { .. }, Value::CellPath { val: rhs, .. }) => {
                 let val = rhs.members.iter().any(|member| match (self, member) {