Inclusion of rename organization api (#33303)

This adds an endpoint (`/orgs/{org}/rename`) to rename organizations.

I've modeled the endpoint using the rename user endpoint --
`/admin/users/{username}/rename` -- as base.

It is the 1st time I wrote a new API endpoint (I've tried to follow the
rename users endpoint code while writing it). So feel free to ping me if
there is something wrong or missing.

Resolves #32995

---------

Signed-off-by: Bruno Sofiato <bruno.sofiato@gmail.com>
Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
(cherry picked from commit 040c830dec5c727a56d16df62b1673bce6fca645)

Conflicts:
	routers/api/v1/admin/user.go
  ignore this unrelated change
	templates/swagger/v1_json.tmpl
  regenerate
	tests/integration/api_org_test.go
  port as a standalone test instead of refactoring the tests

routers/api/v1/swagger/options.go

@@ -216,6 +216,9 @@ type swaggerParameterBodies struct {
 	// in:body
 	CreateVariableOption api.CreateVariableOption
 
+	// in:body
+	RenameOrgOption api.RenameOrgOption
+
 	// in:body
 	UpdateVariableOption api.UpdateVariableOption