monomorphize normalization is broken

[thestinger]

It normalizes types and then results in invalid function calls due to non-matching parameter types. This is causing the performance regression in #8665.

With normalization on:

test bench_insert_find_remove_std ... bench: 108310 ns/iter (+/- 5073)
test bench_insert_std ... bench: 55899 ns/iter (+/- 1959)

With it disabled:

test bench_insert_find_remove_std ... bench: 81217 ns/iter (+/- 5434)
test bench_insert_std ... bench: 42963 ns/iter (+/- 1894)