The `dom::workerinternals::LoadContextOptions` must match the
`ReloadPrefsCallback` handler in order for workers to get the pref updates.
This patch add missing wasm_simd_wormhole and wasm_baselinejit options to
workers. This does change web behaviour but we always intended for the
workers to have same behaviour as main-thread for these two features.
Differential Revision: https://phabricator.services.mozilla.com/D108491