Fix accessor struct field inlining

Fix accessor struct field inlining

* module/oop/goops/compile.scm: Inline into goops.scm, leaving a
  compatible interface stub behind.

* module/oop/goops/dispatch.scm: Don't import (oop goops compile), to
  break circularities.

* module/oop/goops.scm: Move (oop goops util) include up to the top, and
  import (ice-9 match).
  (compute-cmethod): Move here from compile.scm.  Add a special case for
  accessor methods, so as to fix bug #17355.
  (compute-getter-method, compute-setter-method): #:procedure slot is
  now generic.

* test-suite/tests/goops.test ("accessor slots"): New test.