Revert "[vm, ffi] Remove special case for Fuchsia FFI callback thunks."

This reverts commit 61f45d66b2.
This reverts commit a0ab33ac52.
This reverts commit 68e2512ace.
This reverts commit fb732a570d.

TEST=ci
Bug: b/501539846
Cq-Include-Trybots: luci.dart.try:vm-fuchsia-release-x64-try,vm-fuchsia-release-arm64-try,vm-ffi-mac-debug-simarm64_arm64-try,vm-ffi-mac-release-simarm64_arm64-try
Change-Id: I7f27bb15bf1fcb26fe8793a043b7530ed99a02a7
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/495480
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>

runtime/bin/dartvm_test_component.cml

@@ -4,7 +4,7 @@
 
 {
   include: [
-    "//runtime/vm.shard.cml",
+    "//runtime/vm-jit.shard.cml",
   ],
   program: {
     binary: "exe.stripped/dartvm",

runtime/bin/run_vm_tests_test_component.cml

@@ -4,7 +4,7 @@
 
 {
   include: [
-    "//runtime/vm.shard.cml",
+    "//runtime/vm-jit.shard.cml",
   ],
   program: {
     binary: "exe.stripped/run_vm_tests",