Disable new items_after_test_module Clippy lint

This is new in 1.71, but seems to get confused by the test_case macro.
It was supposedly fixed in
rust-lang/rust-clippy#10992 but that seems to
not have entirely worked.

Signed-off-by: James Bornholt <bornholt@amazon.com>

Makefile

@@ -60,4 +60,4 @@ fmt-check:
 .PHONY: clippy
 clippy:
 	@packages=`echo "$(CRATES)" | sed -E 's/(^| )/ -p /g'`; \
-	cargo clippy $$packages --no-deps --all-targets --all-features -- -D clippy::all
+	cargo clippy $$packages --no-deps --all-targets --all-features -- -D clippy::all -A clippy::items-after-test-module