disableSyntheticShadowSupport/lightDOM should remove genScopedId compilation

[nolanlawson]

For light DOM components, as well as shadow DOM components when the disableSyntheticShadowSupport option is enabled, we should not emit genScopedId. I.e. this:

<template>
    <div id="foo"></div>
</template>

function tmpl($api, $cmp, $slotset, $ctx) {
    const {gid: api_scoped_id, h: api_element} = $api;
    return [api_element("div", {
        attrs: {
            "id": api_scoped_id("foo") // <-- this
        },
        key: 0
    })];
}

This is actually a slight perf degradation, because it may cause a VNode to be considered dynamic when it could be static-optimized.