Feature request: Run analyzers in debug mode

Problem motivation: #18768, `app.UseSpa` was in the wrong order.

Add ` app.UseRunAllAnalyzers` to template code to detect middleware order and other problems.

```
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
app.UseDatabaseErrorPage();
app.UseRunAllAnalyzers(); // run middleware order check and other checks
}
else
{
app.UseExceptionHandler("/Error");
app.UseHsts();
}

...
```

`UseRunAllAnalyzers` could be updated frequently to add more checks.

See https://twitter.com/davidfowl/status/1228902288627912705 where `@davidfowl` requests this.

cc @javiercn