Remove lazy records (#12682)

# Description
Removes lazy records from the language, following from the reasons
outlined in #12622. Namely, this should make semantics more clear and
will eliminate concerns regarding maintainability.

# User-Facing Changes
- Breaking change: `lazy make` is removed.
- Breaking change: `describe --collect-lazyrecords` flag is removed.
- `sys` and `debug info` now return regular records.

# After Submitting
- Update nushell book if necessary.
- Explore new `sys` and `debug info` APIs to prevent them from taking
too long (e.g., subcommands or taking an optional column/cell-path
argument).

crates/nu-plugin-protocol/src/plugin_custom_value/mod.rs

@@ -179,11 +179,6 @@ impl PluginCustomValue {
                         Ok(())
                     }
                 }
-                // Collect LazyRecord before proceeding
-                Value::LazyRecord { ref val, .. } => {
-                    *value = val.collect()?;
-                    Ok(())
-                }
                 _ => Ok(()),
             }
         })
@@ -205,11 +200,6 @@ impl PluginCustomValue {
                         Ok(())
                     }
                 }
-                // Collect LazyRecord before proceeding
-                Value::LazyRecord { ref val, .. } => {
-                    *value = val.collect()?;
-                    Ok(())
-                }
                 _ => Ok(()),
             }
         })
@@ -224,11 +214,6 @@ impl PluginCustomValue {
                     *value = val.to_base_value(span)?;
                     Ok(())
                 }
-                // Collect LazyRecord before proceeding
-                Value::LazyRecord { ref val, .. } => {
-                    *value = val.collect()?;
-                    Ok(())
-                }
                 _ => Ok(()),
             }
         })