* Feat: add support for envbinding with namespace selector
(cherry picked from commit 409fe1bf38)
* Fix: service account kubeconfig e2e-test
(cherry picked from commit db7539641c)
* Docs: add comments to explain functions
(cherry picked from commit c9bf6b8914)
* Docs: add envbinding example
(cherry picked from commit 0011c4563f)
Co-authored-by: Yin Da <yd219913@alibaba-inc.com>
