PnP Provisioning Engine template support for publishing pages ?

Yes, you need a local file for what you specified in the src attribute. So in my code sample below mypublishingpage.aspx should be a local file located at the location you specified in your TemplateProvider (connectionstring / container). If you use PowerShell to apply your template the file should be located in location within or relative to the folder from which your PowerShell is executed

The contents of the file, in case where a PublishingPageLayout should indeed be the TemplateRedirectionPage markup you mentioned. 

<pnp:File src="mypublishingpage.aspx" Folder="{site}/Pages" Overwrite="true">
    <pnp:Properties>
        <pnp:Property Key="ContentTypeId" Value="{contenttypeid:MyPageContentType}" />
        <pnp:Property Key="Title" Value="My Publishing Page" />
        <pnp:Property Key="PublishingPageLayout" Value="{sitecollection}/_catalogs/masterpage/MyPageLayout.aspx,  My Page Layout" />            
    </pnp:Properties>
    <pnp:WebParts>
        <pnp:WebPart Order="0" Title="Your WebPart Title" Zone="Center">
            <pnp:Contents>
                <!-- your exported WebPart XML -->
            </pnp:Contents>
        </pnp:WebPart>
    </pnp:WebParts>
</pnp:File>