Merge #11693

11693:  Add a few extra "additionalProperties": false r=Frassle a=Frassle

Places where the binder doesn't expect anything else.

Fixes the "config" schema. The Go struct is declared as:
```
Required []string `json:"defaults,omitempty" yaml:"defaults,omitempty"`
```
But the schema said "required" not "defaults"

Co-authored-by: Fraser Waters <fraser@pulumi.com>

pkg/codegen/schema/pulumi.json

@@ -68,6 +68,7 @@
                     "format": "regex"
                 }
             },
+            "additionalProperties": false,
             "required": ["moduleFormat"]
         },
         "config": {
@@ -81,14 +82,15 @@
                         "$ref": "#/$defs/propertySpec"
                     }
                 },
-                "required": {
-                    "description": "A list of the names of the package's required configuration variables.",
+                "defaults": {
+                    "description": "A list of the names of the package's non-required configuration variables.",
                     "type": "array",
                     "items": {
                         "type": "string"
                     }
                 }
-            }
+            },
+            "additionalProperties": false
         },
         "types": {
             "description": "A map from type token to complexTypeSpec that describes the set of complex types (i.e. object, enum) defined by this package.",