Reland "[ VM ] Removed Dart_Allocate, Dart_AllocateWithNativeFields, and Dart_InvokeConstructor from embedding API"

This reverts commit 34447c8dbb613f63013ff49d8effd1cb807e06b2.

Reason for revert: Last Dart_AllocateWithNativeFields usage removed in Tonic

Original change's description:
> Revert "[ VM ] Removed Dart_Allocate, Dart_AllocateWithNativeFields, and Dart_InvokeConstructor from embedding API"
> 
> This reverts commit 3d1b8b26c2282b27559a42c564035f946492e7cd.
> 
> Reason for revert: Broke Flutter HHH. Dart_AllocateWithNativeFields is still used in Tonic.
> 
> Original change's description:
> > [ VM ] Removed Dart_Allocate, Dart_AllocateWithNativeFields, and Dart_InvokeConstructor from embedding API
> > 
> > These methods are no longer necessary and all objects should be created
> > using Dart_New instead.
> > 
> > Change-Id: If64d3e3579fc03dd1a2eb6bfec73c35e90c66d8f
> > Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/135523
> > Reviewed-by: Ryan Macnak <rmacnak@google.com>
> 
> TBR=bkonyi@google.com,rmacnak@google.com,asiva@google.com
> 
> Change-Id: I3dca62a1db60a90bbcc78c34ae150df628cd85c8
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/135642
> Reviewed-by: Clement Skau <cskau@google.com>
> Commit-Queue: Clement Skau <cskau@google.com>

TBR=bkonyi@google.com,rmacnak@google.com,asiva@google.com,cskau@google.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: I2ac83e1bfccccd9b626acfa4a6ac517b4f3968fb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/136020
Auto-Submit: Ben Konyi <bkonyi@google.com>
Reviewed-by: Ben Konyi <bkonyi@google.com>
Commit-Queue: Ben Konyi <bkonyi@google.com>