Spanned Value step 1: span all value cases (#10042)

# Description

This doesn't really do much that the user could see, but it helps get us
ready to do the steps of the refactor to split the span off of Value, so
that values can be spanless. This allows us to have top-level values
that can hold both a Value and a Span, without requiring that all values
have them.

We expect to see significant memory reduction by removing so many
unnecessary spans from values. For example, a table of 100,000 rows and
5 columns would have a savings of ~8megs in just spans that are almost
always duplicated.

# User-Facing Changes

Nothing yet

# Tests + Formatting
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crates/nu-cmd-dataframe/src/dataframe/series/indexes/set_with_idx.rs

@@ -82,7 +82,7 @@ fn command(
     let indices_value: Value = call
         .get_flag(engine_state, stack, "indices")?
         .expect("required named value");
-    let indices_span = indices_value.span()?;
+    let indices_span = indices_value.span();
     let indices = NuDataFrame::try_from_value(indices_value)?.as_series(indices_span)?;
 
     let casted = match indices.dtype() {
@@ -204,7 +204,7 @@ fn command(
                 "this value cannot be set in a series of type '{}'",
                 series.dtype()
             ),
-            Some(value.span()?),
+            Some(value.span()),
             None,
             Vec::new(),
         )),

crates/nu-cmd-dataframe/src/dataframe/series/masks/is_in.rs

@@ -74,7 +74,7 @@ fn command(
     let df = NuDataFrame::try_from_pipeline(input, call.head)?;
 
     let other_value: Value = call.req(engine_state, stack, 0)?;
-    let other_span = other_value.span()?;
+    let other_span = other_value.span();
     let other_df = NuDataFrame::try_from_value(other_value)?;
     let other = other_df.as_series(other_span)?;
 

crates/nu-cmd-dataframe/src/dataframe/series/masks/set.rs

@@ -81,7 +81,7 @@ fn command(
     let mask_value: Value = call
         .get_flag(engine_state, stack, "mask")?
         .expect("required named value");
-    let mask_span = mask_value.span()?;
+    let mask_span = mask_value.span();
     let mask = NuDataFrame::try_from_value(mask_value)?.as_series(mask_span)?;
 
     let bool_mask = match mask.dtype() {
@@ -185,7 +185,7 @@ fn command(
                 "this value cannot be set in a series of type '{}'",
                 series.dtype()
             ),
-            Some(value.span()?),
+            Some(value.span()),
             None,
             Vec::new(),
         )),

crates/nu-cmd-dataframe/src/dataframe/series/string/concatenate.rs

@@ -74,7 +74,7 @@ fn command(
     let df = NuDataFrame::try_from_pipeline(input, call.head)?;
 
     let other: Value = call.req(engine_state, stack, 0)?;
-    let other_span = other.span()?;
+    let other_span = other.span();
     let other_df = NuDataFrame::try_from_value(other)?;
 
     let other_series = other_df.as_series(other_span)?;