gh-115778: Add tierN annotation for instruction definitions (#115815)

This replaces the old `TIER_{ONE,TWO}_ONLY` macros. Note that `specialized` implies `tier1`.

Co-authored-by: Alex Waygood <[email protected]>

Author: Eclips4

Misc/NEWS.d/next/Core and Builtins/2024-02-22-11-33-20.gh-issue-115778.jksd1D.rst

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+Add ``tierN`` annotation for instruction definition in interpreter DSL.