[MLIR] Remove unneeded FuncOps.h include in AffineAnalysis (#85912)

This fixes the following failure when doing a clean build (in particular
no .ninja* lying around) of lib/libMLIRAffineAnalysis.a only:

In file included from
mlir/lib/Dialect/Affine/Analysis/AffineAnalysis.cpp:20:
mlir/include/mlir/Dialect/Func/IR/FuncOps.h:29:10: fatal error:
mlir/Dialect/Func/IR/FuncOps.h.inc: No such file or directory