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Remove the `#[no_sanitize]` attribute in favor of `#[sanitize(xyz = "on|off")]` This came up during the sanitizer stabilization (rust-lang/rust#123617). Instead of a `#[no_sanitize(xyz)]` attribute, we would like to have a `#[sanitize(xyz = "on|off")]` attribute, which is more powerful and allows to be extended in the future (instead of just focusing on turning sanitizers off). The implementation is done according to what was [discussed on Zulip](https://rust-lang.zulipchat.com/#narrow/channel/343119-project-exploit-mitigations/topic/Stabilize.20the.20.60no_sanitize.60.20attribute/with/495377292)). The new attribute also works on modules, traits and impl items and thus enables usage as the following: ```rust #[sanitize(address = "off")] mod foo { fn unsanitized(..) {} #[sanitize(address = "on")] fn sanitized(..) {} } trait MyTrait { #[sanitize(address = "off")] fn unsanitized_default(..) {} } #[sanitize(thread = "off")] impl MyTrait for () { ... } ``` r? ```@rcvalle```