fix: panic of if command as a constant expr by bringing back Type::Block (#16122)

Fixes #16110. Alternative to #16120 

# Description

# User-Facing Changes

no more panic

# Tests + Formatting

+1

# After Submitting

crates/nu-command/src/database/commands/into_sqlite.rs

@@ -353,6 +353,7 @@ fn nu_value_to_sqlite_type(val: &Value) -> Result<&'static str, ShellError> {
 
         // intentionally enumerated so that any future types get handled
         Type::Any
+        | Type::Block
         | Type::CellPath
         | Type::Closure
         | Type::Custom(_)