Hello Francesco I have been wanting to submit this to odoo for quite a while and maybe I will, here is how I did it:

        <template id="report_minimal_layout" inherit_id="report.minimal_layout" >
            <xpath expr="//head" position="inside">
              <script src='/module_name/static/js/pagination_hide.js'></script> <-- Must be added in the module -->
            </xpath>

            <xpath expr="//body" position="attributes">
                <attribute t-translation="off" name="onload">subst(); pagination_hide();</attribute>
            </xpath>
        </template>

Contents of the js file:

function pagination_hide() {
    var vars = {};
    var x = document.location.search.substring(1).split('&');
    for (var i in x) {
        var z = x[i].split('=', 2);
        vars[z[0]] = unescape(z[1]);
    }

    if (vars['page'] <= 1){
        hidden_nodes = document.getElementsByClassName("hide_firstpage");
        for (i = 0; i < hidden_nodes.length; i++) {
            hidden_nodes[i].style.visibility = "hidden";
        }
    }

    if (vars['page'] == vars['topage']){
        hidden_nodes = document.getElementsByClassName("show_lastpage");
        for (i = 0; i < hidden_nodes.length; i++) {
            hidden_nodes[i].style.display = "block";
        }
    }

    if (vars['page'] == 1){
        hidden_nodes = document.getElementsByClassName("show_firstpage");
        for (i = 0; i < hidden_nodes.length; i++) {
            hidden_nodes[i].style.display = "block";
        }
    }
}

Of course this will not actually remove the footer and allow for the body content to stretch to the very bottom but it show/hides depending on the page it is on using css to alter the display property

After doing this you can use these helper classes which do pretty much what they say