Remove implementations of Intrinsic

[jeffcharles]

Description of the change

Removes implementations of rquickjs's Intrinsic trait and inlines the implementations at their call sites.

There shouldn't be anything that impacts the crate's public API or the crate's users so I'm not going to add a CHANGELOG entry.

Why am I making this change?

Intrinsic was and is meant to be an internal trait of rquickjs. They made a change to require all implementations of Intrinsic to also implement Sealed which can't be implemented by crates outside of rquickjs with the intention of blocking crates using rquickjs from implementing Intrinsic. So I'm removing our implementations of Intrinsic from our codebase so we can update rquickjs versions.

Checklist

• I've updated the relevant CHANGELOG files if necessary. Changes to javy-cli and javy-plugin do not require updating CHANGELOG files.
• I've updated the relevant crate versions if necessary. Versioning policy for library crates
• I've updated documentation including crate documentation if necessary.