Add micro slab archive banner

[nrsa222]

• Add archive notice banner to top of FA above universal header.

HTML

<div class="slab slab--wildcat-black slab--micro">
    <div class="slab__wrapper">
        <div class="banner-archive">
            <span class="icon-label icon-label--micro">
                <span class="ic ic--info" aria-hidden="true"></span>
                <span class="label">This content is archived and is maintained for historical, research, or recordkeeping purposes only.</span>
            </span>
        </div>
    </div>
</div>

CSS

/*Archive content banner*/
@scope (.slab--micro) {
    :scope{
        padding-top: .2rem;
        padding-bottom: .2rem;
    }
    .icon-label--micro {
        font-size: .81rem;
        margin-top: .2rem;
        margin-bottom: .2rem; 
    }    
}