perf: two minor perf refactors in InvokeIpcCallback()
1. Allocate the CallbackScope on the stack instead of the heap
2. Skip a redundant call to node::Environment::GetCurrent()
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Charles Kerr <charles@charleskerr.com>
* refactor: add a v8::Isolate* arg to Constructible::GetConstructor()
* refactor: add a v8::Isolate* arg to NodeBindings::Initialize()
This is needed for the GetConstructor() call
* refactor: avoid v8::Context::GetIsolate() call in GetIpcObject() by taking it as an arg
* refactor: avoid v8::Context::GetIsolate() call in ipc_native::EmitIPCEvent() by taking it as an arg
