static/frontend/search: add stdlib badge to symbol search page
The standard library chip text was only on the package search page. It
is now present in both modes.
For golang/go#44142
Trust: Julie Qiu
Run-TryBot: Julie Qiu
TryBot-Result: kokoro
<a href="/{{$r.PackagePath}}" data-gtmc="symbol search result package" data-gtmv="{{$i}}"
class="">{{$r.PackagePath}}</a>
</h2>
+ {{with $r.ChipText}}<span class="go-Chip go-Chip--inverted">{{.}}</span>{{end}}
</div>
<div class="SearchSnippet-infoLabel go-textSubtle" data-test-id="snippet-synopsis">{{$r.Synopsis}}</div>
<pre class="SearchSnippet-symbolCode">{{.SymbolSynopsis}}</pre>
