test: add regress test for #58572

Fixes #58572.

Change-Id: I75fa432afefc3e036ed9a6a9002a29d7b23105ee
Reviewed-on: https://go-review.googlesource.com/c/go/+/468880
Reviewed-by: Keith Randall <khr@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>

test/fixedbugs/issue58572.go

@@ -0,0 +1,29 @@
+// compile
+
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package p
+
+func New() resource {
+	return &Client{}
+}
+
+type resource interface {
+	table()
+}
+
+type Client struct {
+	m map[Key1]int
+}
+
+func (c *Client) table() {}
+
+type Key1 struct {
+	K Key2
+}
+
+type Key2 struct {
+	f [2]any
+}