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/folder_test.go

@@ -148,10 +148,11 @@ func createFolderScenario(t *testing.T, desc string, url string, routePattern st
 
 		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.CreateFolder(c, cmd)
+			return hs.CreateFolder(c)
 		})
 
 		origNewFolderService := dashboards.NewFolderService
@@ -182,10 +183,11 @@ func updateFolderScenario(t *testing.T, desc string, url string, routePattern st
 
 		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.UpdateFolder(c, cmd)
+			return hs.UpdateFolder(c)
 		})
 
 		origNewFolderService := dashboards.NewFolderService