test(ssr): add test for scoped slots with lwc:is (#4920)

packages/@lwc/engine-server/src/__tests__/fixtures/dynamic-components/slots/scoped-slots/config.json

@@ -0,0 +1,6 @@
+{
+  "ssrFiles": {
+    "error": "error-ssr.txt",
+    "expected": "expected-ssr.html"
+  }
+}

packages/@lwc/engine-server/src/__tests__/fixtures/dynamic-components/slots/scoped-slots/error-ssr.txt

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+Template compilation failure; see warnings in the console.

packages/@lwc/engine-server/src/__tests__/fixtures/dynamic-components/slots/scoped-slots/error.txt

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+LWC1178: <template> tag with lwc:slot-data directive must be the direct child of a custom element.

packages/@lwc/engine-server/src/__tests__/fixtures/dynamic-components/slots/scoped-slots/index.js

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+export const tagName = 'x-dynamic-component';
+export { default } from 'x/dynamic';
+export * from 'x/dynamic';

packages/@lwc/engine-server/src/__tests__/fixtures/dynamic-components/slots/scoped-slots/modules/x/dynamic/dynamic.html

@@ -0,0 +1,7 @@
+<template>
+    <lwc:component lwc:is={customCtor}>
+        <template lwc:slot-data="data">
+            <span>{data.id} - {data.name}</span>
+        </template>
+    </lwc:component>
+</template>

packages/@lwc/engine-server/src/__tests__/fixtures/dynamic-components/slots/scoped-slots/modules/x/dynamic/dynamic.js

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+import { LightningElement, track } from 'lwc';
+import Test from 'x/test';
+
+export default class DynamicCtor extends LightningElement {
+    @track customCtor = Test;
+}

packages/@lwc/engine-server/src/__tests__/fixtures/dynamic-components/slots/scoped-slots/modules/x/test/test.html

@@ -0,0 +1,5 @@
+<template lwc:render-mode="light">
+    a
+    <slot lwc:slot-bind={item}>Default slot content</slot>
+    b
+</template>

packages/@lwc/engine-server/src/__tests__/fixtures/dynamic-components/slots/scoped-slots/modules/x/test/test.js

@@ -0,0 +1,5 @@
+import { LightningElement } from 'lwc';
+
+export default class Test extends LightningElement {
+    static renderMode = 'light'
+}