perf(neon): Switch to `InheritedHandleScope` on most `Context` structs
perf(neon): Switch to `InheritedHandleScope` on most `Context` structs

Node-API creates handle scopes as part of the environment. Creating an explicit scope is only necessary for `Context::compute_scoped` and `Context::execute_scoped`.

neon-bindings/neon,neon-bindings/neon,neon-bindings/neon,neon-bindings/neon