Chore: Refactor api handlers to use web.Bind (#42199)

* Chore: Refactor api handlers to use web.Bind

* fix comments

* fix comment

* trying to fix most of the tests and force routing.Wrap type check

* fix library panels tests

* fix frontend logging tests

* allow passing nil as a response to skip writing

* return nil instead of the response

* rewrite login handler function types

* remove handlerFuncCtx

* make linter happy

* remove old bindings from the libraryelements

* restore comments

pkg/api/short_url_test.go

@@ -64,10 +64,11 @@ func createShortURLScenario(t *testing.T, desc string, url string, routePattern
 
 		sc := setupScenarioContext(t, url)
 		sc.defaultHandler = routing.Wrap(func(c *models.ReqContext) response.Response {
+			c.Req.Body = mockRequestBody(cmd)
 			sc.context = c
 			sc.context.SignedInUser = &models.SignedInUser{OrgId: testOrgID, UserId: testUserID}
 
-			return hs.createShortURL(c, cmd)
+			return hs.createShortURL(c)
 		})
 
 		sc.m.Post(routePattern, sc.defaultHandler)