Update glimmer-vm to prevent errors for older inline precompilation

This updates glimmer-vm to avoid emitting the `scope` property on
precompiled template blocks when not using strict mode (when using
strict mode `scope` will either be `null` or a function).

This is specifically to work around a bug in older versions of
babel-plugin-htmlbars-inline-precompile (versions from v2.0.0 through
v4.0.1) where they would (incorrectly) attempt to build an
`ObjectExpression` when a `null` value is found in the template
precompilation result (D'oh!).

Note: those versions of babel-plugin-htmlbars-inline-precompile should
still be migrated away from (they are quite old, and will definitely not
work for newer features like strict mode).

(cherry picked from commit 9bc0b49)

package.json

@@ -51,7 +51,7 @@
     "@babel/plugin-transform-block-scoping": "^7.8.3",
     "@babel/plugin-transform-object-assign": "^7.8.3",
     "@ember/edition-utils": "^1.2.0",
-    "@glimmer/vm-babel-plugins": "0.74.0",
+    "@glimmer/vm-babel-plugins": "0.74.2",
     "babel-plugin-debug-macros": "^0.3.3",
     "babel-plugin-filter-imports": "^4.0.0",
     "broccoli-concat": "^4.2.4",
@@ -75,19 +75,19 @@
   },
   "devDependencies": {
     "@babel/preset-env": "^7.9.5",
-    "@glimmer/compiler": "0.74.0",
+    "@glimmer/compiler": "0.74.2",
     "@glimmer/env": "^0.1.7",
-    "@glimmer/global-context": "0.74.0",
-    "@glimmer/interfaces": "0.74.0",
-    "@glimmer/manager": "0.74.0",
-    "@glimmer/destroyable": "0.74.0",
-    "@glimmer/owner": "0.74.0",
-    "@glimmer/node": "0.74.0",
-    "@glimmer/opcode-compiler": "0.74.0",
-    "@glimmer/program": "0.74.0",
-    "@glimmer/reference": "0.74.0",
-    "@glimmer/runtime": "0.74.0",
-    "@glimmer/validator": "0.74.0",
+    "@glimmer/global-context": "0.74.2",
+    "@glimmer/interfaces": "0.74.2",
+    "@glimmer/manager": "0.74.2",
+    "@glimmer/destroyable": "0.74.2",
+    "@glimmer/owner": "0.74.2",
+    "@glimmer/node": "0.74.2",
+    "@glimmer/opcode-compiler": "0.74.2",
+    "@glimmer/program": "0.74.2",
+    "@glimmer/reference": "0.74.2",
+    "@glimmer/runtime": "0.74.2",
+    "@glimmer/validator": "0.74.2",
     "@simple-dom/document": "^1.4.0",
     "@types/qunit": "^2.9.1",
     "@types/rsvp": "^4.0.3",

packages/@ember/-internals/glimmer/lib/environment.ts

@@ -70,7 +70,10 @@ setGlobalContext({
 
       if (!override) throw new Error(`deprecation override for ${id} not found`);
 
-      deprecate(override.message ?? msg, Boolean(test), override);
+      // allow deprecations to be disabled in the VM_DEPRECATION_OVERRIDES array below
+      if (!override.disabled) {
+        deprecate(override.message ?? msg, Boolean(test), override);
+      }
     }
   },
 });
@@ -91,7 +94,10 @@ if (DEBUG) {
 
 // VM Assertion/Deprecation overrides
 
-const VM_DEPRECATION_OVERRIDES: (DeprecationOptions & { message?: string })[] = [
+const VM_DEPRECATION_OVERRIDES: (DeprecationOptions & {
+  disabled?: boolean;
+  message?: string;
+})[] = [
   {
     id: 'autotracking.mutation-after-consumption',
     until: '4.0.0',
@@ -100,6 +106,16 @@ const VM_DEPRECATION_OVERRIDES: (DeprecationOptions & { message?: string })[] =
       enabled: '3.21.0',
     },
   },
+  {
+    id: 'this-property-fallback',
+    disabled: true,
+    url: 'https://deprecations.emberjs.com/v3.x#toc_this-property-fallback',
+    until: '4.0.0',
+    for: 'ember-source',
+    since: {
+      enabled: '3.26.0',
+    },
+  },
 ];
 
 const VM_ASSERTION_OVERRIDES: { id: string; message: string }[] = [];