[cd] Bump CIRCT from firtool-1.65.0 to firtool-1.66.0 (#3831)

* [cd] Bump CIRCT from firtool-1.65.0 to firtool-1.66.0

This is an automated commit generated by the `circt/update-circt` GitHub
Action.

* Update BoringUtils test for FIRRTL 4.0 (#3816)

Fix a BoringUtils test that was checking for the name of a define produce
by CIRCT.  This was changed slightly in FIRRTL 4.0.  Align the test with
the new Verilog macro name.

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@sifive.com>
Co-authored-by: chiselbot <chiselbot@users.noreply.github.com>