Ensure private UID generation takes into account all referenced private names

packages/babel-plugin-proposal-decorators/test/fixtures/2021-12-transform-only-misc/private-keys-in-enclosing-class/input.js

@@ -0,0 +1,10 @@
+class A {
+  #A = 1;
+  static B = class B extends A {
+    accessor a = 2;
+
+    getA() {
+      return this.#A;
+    }
+  }
+}

packages/babel-plugin-proposal-decorators/test/fixtures/2021-12-transform-only-misc/private-keys-in-enclosing-class/output.js

@@ -0,0 +1,19 @@
+class A {
+  #A = 1;
+  static B = class B extends A {
+    #B = 2;
+
+    get a() {
+      return this.#B;
+    }
+
+    set a(v) {
+      this.#B = v;
+    }
+
+    getA() {
+      return this.#A;
+    }
+
+  };
+}