Update ptl to 1.3 on main branch
This pull request **introduces 1 alert** when merging 1c2ead52bc3b9c67f46f46636b31a0fc01a39935 into b44a1077df4579ecdba9a5386fbfe2c0bcd20667 - [view on LGTM.com](https://lgtm.com/projects/g/NVIDIA/NeMo/rev/pr-49f72b46b780b693b22b9ea54e2714adcf6aa8e4)

**new alerts:**

* 1 for Unused import This pull request **introduces 1 alert** when merging af4f0ae39bbcb6b1c3a169c400ddb294bc21e6ad into b44a1077df4579ecdba9a5386fbfe2c0bcd20667 - [view on LGTM.com](https://lgtm.com/projects/g/NVIDIA/NeMo/rev/pr-fa66ff601ca8f005bd838a12936ec73ea14b545d)

**new alerts:**

* 1 for Unused import This pull request **introduces 1 alert** when merging ac3ddf6a8c5b22e732056754a4f3d6a5c1681c2f into b44a1077df4579ecdba9a5386fbfe2c0bcd20667 - [view on LGTM.com](https://lgtm.com/projects/g/NVIDIA/NeMo/rev/pr-04bad2d21a3d210cc6265712240fb61299f28970)

**new alerts:**

* 1 for Unused import The naming convention for the latest checkpoint in lightning changed in 1.3, so I updated it. This pull request **introduces 1 alert** when merging b4b5854e2db3a1fe15e57405ca8b95ae2640c937 into b44a1077df4579ecdba9a5386fbfe2c0bcd20667 - [view on LGTM.com](https://lgtm.com/projects/g/NVIDIA/NeMo/rev/pr-700a8bce21ca405f90a531a19b4793ce0b311f18)

**new alerts:**

* 1 for Unused import Thanks @blisc !
# Changelog
- Update PTL to 1.3
- Fix related broken tests in NeMo