message: Fix some migration errors
  * Don't include migrations in Target for preview uploads
  * Update src/settings/toml/manifest.rs
  lint fix
diff: @@ -375,10 +375,13 @@ impl Manifest {
  name: self.name.clone(), // Inherited
  kv_namespaces: get_namespaces(self.kv_namespaces.clone(), preview)?, // Not inherited
  durable_objects: self.durable_objects.clone(), // Not inherited
  - migrations: self.migrations.as_ref().map(|migrations| Migrations::List {
  + migrations: match (preview, &self.migrations) {
  + (false, Some(migrations)) => Some(Migrations::List {
  script_tag: MigrationTag::Unknown,
  migrations: migrations.clone(),
  - }), // Top Level
  + }),
  + _ => None,
  + }, // Top level
  site: self.site.clone(), // Inherited
  vars: self.vars.clone(), // Not inherited
  text_blobs: self.text_blobs.clone(), // Inherited
  