Variables: variables in Markdown links are not interpolated (#51392)

* on a text panel first interpolate, then markdown, then sanitize;

* update devenv dashboard + e2e tests

* fix typo and undo changes in grafana/data

* handling of config option disableSanitizeHtml more readable when preparing markdown in text panel

* betterer

Co-authored-by: Ashley Harrison <ashley.harrison@grafana.com>

e2e/dashboards-suite/dashboard-templating.spec.ts

@@ -27,7 +27,7 @@ e2e.scenario({
       `Server:pipe = A'A"A|BB\\B|CCC`,
       `Server:distributed = A'A"A,Server=BB\\B,Server=CCC`,
       `Server:csv = A'A"A,BB\\B,CCC`,
-      `Server:html = A'A"A, BB\\B, CCC`,
+      `Server:html = A'A"A, BB\\B, CCC`,
       `Server:json = ["A'A\\"A","BB\\\\B","CCC"]`,
       `Server:percentencode = %7BA%27A%22A%2CBB%5CB%2CCCC%7D`,
       `Server:singlequote = 'A\\'A"A','BB\\B','CCC'`,
@@ -36,11 +36,13 @@ e2e.scenario({
       `Server:date = null`,
       `Server:text = All`,
       `Server:queryparam = var-Server=All`,
+      `1 < 2`,
+      `Example: from=now-6h&to=now`,
     ];
 
     e2e()
       .get('.markdown-html li')
-      .should('have.length', 24)
+      .should('have.length', 26)
       .each((element) => {
         items.push(element.text());
       })
@@ -49,5 +51,10 @@ e2e.scenario({
           expect(items[index]).to.equal(expected);
         });
       });
+
+    // Check link interpolation is working correctly
+    e2e()
+      .contains('a', 'Example: from=now-6h&to=now')
+      .should('have.attr', 'href', 'https://example.com/?from=now-6h&to=now');
   },
 });