Introduce AffineMap::compose(AffineMap)

This CL is the 2nd on the path to simplifying AffineMap composition.
This CL uses the now accepted `AffineExpr::compose(AffineMap)` to
implement `AffineMap::compose(AffineMap)`.

Implications of keeping the simplification function in
Analysis are documented where relevant.

PiperOrigin-RevId: 228276646
7 files changed
tree: d12085ca9663e96a695a4a7da6c1c40ec76bcf54
  1. g3doc/
  2. include/
  3. lib/
  4. test/
  5. tools/
  6. utils/
  7. .clang-format
  8. LICENSE.TXT