chore: fix `lazy_static` usage
chore: fix `lazy_static` usage

Enables the `drop_types_in_const` nightly feature to re-allow the use of
`lazy_static`.

rusoto/rusoto,SecurityInsanity/rusoto,SecurityInsanity/rusoto,DualSpark/rust-aws,DualSpark/rusoto,DualSpark/rusoto,rusoto/rusoto,mthjones/rusoto,mattico/rusoto,mattico/rusoto,ford-prefect/rusoto,indiv0/rusoto,mattico/rusoto,rusoto/rusoto,ford-prefect/rusoto,DualSpark/rust-aws,mthjones/rusoto,DualSpark/rust-aws,noggleboggle/rusoto,cmsd2/rusoto,DualSpark/rusoto