`TemplateProcessing` does not apply `type_id` to overflow encodings

[antoine-agthe-unity]

A piece is applied with a specific type_id, no matter if it is a SpecialToken or a Sequence.
But when the piece is a sequence with some overflows, it only applies the specified type_id to the main encoding.
Is that legit?

tokenizers/tokenizers/src/processors/template.rs

Line 557 in f7db48f

encoding.set_type_ids(vec![*type_id; encoding.len()]);