In this commit, we simplify the assertions made in run functions with more explicit triggers that use Hoot's pseudo-selectors. This is almost the same thing, except that the macro system waits to find the trigger (animationFrame by animationFrame). If, for some reason, the parent element already exists but not the child element sought in the run function, then the tour spits out... indeterministically.
So this commit can also fix tours.

For example:
{
    trigger: ".o-web-studio-report-container :iframe body",
    run() {
        assertEqual(
            this.anchor.querySelector(".test-added-0").textContent,
            "in document view"
        );
        assertEqual(this.anchor.querySelector(".test-added-1").textContent, "in main view");
    },
},

:iframe body is present but not ".test-added-0" yet ... then the assertion failed when it is enough just to wait for the element to be in the dom.

Is fixed with :
{
    trigger: ".o-web-studio-report-container :iframe body .test-added-0:contains(in document view)",
},
{
    trigger: ".o-web-studio-report-container :iframe body .test-added-1:contains(in main view)",
}

Forward-Port-Of: odoo/enterprise#90404