fix: v2 non-field api support (#5178)

* fix: support non-field api in ssr

* chore: tests

* fix: additional coverage, redundant api decorator error

* chore: add throw TODO

* fix: added tests

Author: jhefferman-sfdc

packages/@lwc/engine-server/src/__tests__/fixtures/api/decorated-getter/error.txt

@@ -0,0 +1,14 @@
+<x-parent>
+  <template shadowrootmode="open">
+    <x-child>
+      <template shadowrootmode="open">
+        const setter getter api value
+      </template>
+    </x-child>
+    <x-child>
+      <template shadowrootmode="open">
+        setter getter api value
+      </template>
+    </x-child>
+  </template>
+</x-parent>

packages/@lwc/engine-server/src/__tests__/fixtures/api/decorated-getter/expected.html

@@ -0,0 +1,3 @@
+export const tagName = 'x-parent';
+export { default } from 'x/parent';
+export * from 'x/parent';

packages/@lwc/engine-server/src/__tests__/fixtures/api/decorated-getter/index.js

@@ -0,0 +1,3 @@
+<template>
+    {setterGetterApi}
+</template>

packages/@lwc/engine-server/src/__tests__/fixtures/api/decorated-getter/modules/x/child/child.html

@@ -0,0 +1,12 @@
+import { LightningElement, api } from 'lwc';
+
+export default class Child extends LightningElement {
+    set setterGetterApi(value) {
+        this._someApi = value;
+    }
+
+    @api
+    get setterGetterApi() {
+        return this._someApi;
+    }
+}

packages/@lwc/engine-server/src/__tests__/fixtures/api/decorated-getter/modules/x/child/child.js

@@ -0,0 +1,4 @@
+<template>
+    <x-child setter-getter-api="const setter getter api value"></x-child>
+    <x-child setter-getter-api={setterGetterApiValue}></x-child>
+</template>

packages/@lwc/engine-server/src/__tests__/fixtures/api/decorated-getter/modules/x/parent/parent.html

@@ -0,0 +1,5 @@
+import { LightningElement } from 'lwc';
+
+export default class Parent extends LightningElement {
+    setterGetterApiValue = 'setter getter api value';
+}

packages/@lwc/engine-server/src/__tests__/fixtures/api/decorated-getter/modules/x/parent/parent.js

@@ -0,0 +1 @@
+LWC1112: @api get setterGetterApi and @api set setterGetterApi detected in class declaration. Only one of the two needs to be decorated with @api.

packages/@lwc/engine-server/src/__tests__/fixtures/api/decorated-setter-getter/error.txt

@@ -0,0 +1,3 @@
+export const tagName = 'x-parent';
+export { default } from 'x/parent';
+export * from 'x/parent';