Handle processing instruction tokens in head noscript & in template

Tests: web-platform-tests/wpt#61120

Author: sirreal

source

@@ -145633,6 +145633,7 @@ document.body.appendChild(text);
    <dt>A character token that is one of U+0009 CHARACTER TABULATION, U+000A LINE FEED (LF), U+000C
    FORM FEED (FF), U+000D CARRIAGE RETURN (CR), or U+0020 SPACE</dt>
    <dt>A comment token</dt>
+   <dt>A processing instruction token</dt>
    <dt>A start tag whose tag name is one of: "basefont", "bgsound", "link", "meta", "noframes",
    "style"</dt>
    <dd>
@@ -147924,6 +147925,7 @@ document.body.appendChild(text);
 
    <dt>A character token</dt>
    <dt>A comment token</dt>
+   <dt>A processing instruction token</dt>
    <dt>A DOCTYPE token</dt>
    <dd>
     <p>Process the token <span>using the rules for</span> the "<span data-x="insertion mode: in