Log Message:
harfbuzz*: update to 7.3.0

Overview of changes leading to 7.3.0
Tuesday, May 9, 2023
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- Speedup applying glyph variation in VarComposites fonts (over 40% speedup).
  (Behdad Esfahbod)
- Speedup instancing some fonts (over 20% speedup in instancing RobotoFlex).
  (Behdad Esfahbod)
- Speedup shaping some fonts (over 30% speedup in shaping Roboto).
  (Behdad Esfahbod)
- Support subsetting VarComposites and beyond-64k fonts. (Behdad Esfahbod)
- New configuration macro HB_MINIMIZE_MEMORY_USAGE to favor optimizing memory
  usage over speed. (Behdad Esfahbod)
- Supporting setting the mapping between old and new glyph indices during
  subsetting. (Garret Rieger)
- Various fixes and improvements.
  (Behdad Esfahbod, Denis Rochette, Garret Rieger, Han Seung Min, Qunxin Liu)