Add test for legacy style names (#15384)

Long term I want to introduce a new snake_case based naming system to
schemas. There's an internal design doc about this at
https://docs.google.com/document/d/1ns07htpLjw0dJPn5p7TBPVULvwwYc1Pl7l1c1jdGXoY/edit.

As part of that we get the nice feature that _nearly_ all current names
are either valid and the same in both system (e.g. "foo"), or they look
different in the current system (e.g. "fooBar"). But there are a handful
of odd cases where we have providers using names that look like they
should be new style snake case names (e.g. kubernetes has a load of
"x_kubernetes_" properties).

To provide a way to ensure k8s can stay on the current name generation
(even though it gives pretty odd results) this change adds a test with a
schema demonstrating a load of snake_case names. When we do add the new
naming system this test _should not diff_, excepting possibly setting an
option if the new naming system is opt-out rather than opt-in.

pkg/codegen/testing/test/sdk_driver.go

@@ -430,6 +430,11 @@ var PulumiPulumiSDKTests = []*SDKTest{
 		Directory:   "unions-inline",
 		Description: "Testing the use of unions/oneOf in the schema inline with the property definition.",
 	},
+	{
+		Directory:   "legacy-names",
+		Description: "Testing the use of snake_case names and tokens.",
+		Skip:        codegen.NewStringSet("go/test"),
+	},
 }
 
 var genSDKOnly bool

pkg/codegen/testing/test/testdata/legacy-names/docs/HTTP_module/_index.md

@@ -0,0 +1,23 @@
+---
+title: "HTTP_module"
+title_tag: "legacy_names.HTTP_module"
+meta_desc: "Explore the resources and functions of the legacy_names.HTTP_module module."
+layout: api
+no_edit_this_page: true
+---
+
+<!-- WARNING: this file was generated by test. -->
+<!-- Do not edit by hand unless you're certain you know what you are doing! -->
+
+Explore the resources and functions of the legacy_names.HTTP_module module.
+
+<h2 id="package-details">Package Details</h2>
+<dl class="package-details">
+	<dt>Repository</dt>
+	<dd><a href="">legacy_names </a></dd>
+	<dt>License</dt>
+	<dd></dd>
+	<dt>Version</dt>
+	<dd>1.0.0</dd>
+</dl>
+

pkg/codegen/testing/test/testdata/legacy-names/docs/_index.md

@@ -0,0 +1,34 @@
+---
+title: "legacy_names"
+title_tag: "legacy_names Package"
+meta_desc: ""
+layout: api
+no_edit_this_page: true
+---
+
+<!-- WARNING: this file was generated by test. -->
+<!-- Do not edit by hand unless you're certain you know what you are doing! -->
+
+
+
+<h2 id="modules">Modules</h2>
+<ul class="api">
+    <li><a href="http_module/" title="HTTP_module">HTTP_module</a></li>
+</ul>
+
+<h2 id="resources">Resources</h2>
+<ul class="api">
+    <li><a href="example_resource/" title="Example_resource">Example_resource</a></li>
+    <li><a href="provider/" title="Provider">Provider</a></li>
+</ul>
+
+<h2 id="package-details">Package Details</h2>
+<dl class="package-details">
+	<dt>Repository</dt>
+	<dd><a href="">legacy_names </a></dd>
+	<dt>License</dt>
+	<dd></dd>
+	<dt>Version</dt>
+	<dd>1.0.0</dd>
+</dl>
+

pkg/codegen/testing/test/testdata/legacy-names/docs/codegen-manifest.json

@@ -0,0 +1,8 @@
+{
+  "emittedFiles": [
+    "HTTP_module/_index.md",
+    "_index.md",
+    "example_resource/_index.md",
+    "provider/_index.md"
+  ]
+}