[NVIDIA TF] Update cudnn frontend to v0.8
v0.8 is not available at https://github.com/NVIDIA/cudnn-frontend at the main branch. I cannot proceed until it has been updated. > v0.8 is not available at https://github.com/NVIDIA/cudnn-frontend at the main branch. I cannot proceed until it has been updated.

Thanks for the comment. Yes, we are working on releasing it soon. And this PR will be updated accordingly. Will ping you after that. There was an update ~1.5 days ago. Is that the final update to v0.8? Or are more changes expected? @pgpetrak Thanks for the checkup. I have pushed a new commit to use the official v0.8 release and updated the PR description to reflect this. PTAL. Basically, there are two changes of this PR: (1) update the download url and (2) update the patch file.

Then, I checked the above automatically created PR https://github.com/openxla/xla/pull/1589, and saw one test "XLA Linux GPU" fails.

It seems that the above PR only fetches the change (2) and I don't know how to make it to apply the change (1) as well (I guess it uses a different way to download the zip rather than `workspace2.bzl`.).

@reedwm Can you help or redirect? > Basically, there are two changes of this PR: (1) update the download url and (2) update the patch file.
> 
> Then, I checked the above automatically created PR [openxla/xla#1589](https://github.com/openxla/xla/pull/1589), and saw one test "XLA Linux GPU" fails.
> 
> It seems that the above PR only fetches the change (2) and I don't know how to make it to apply the change (1) as well (I guess it uses a different way to download the zip rather than `workspace2.bzl`.).
> 
> @reedwm Can you help or redirect?

@jakeharmon8 do you know how to fix this? I think this PR also needs to update the [`workspace2.bzl` in the openxla/xla repo](https://github.com/openxla/xla/blob/main/workspace2.bzl), in addition to the `workspace2.bzl` that it already updates in the TF repo. But a PR can only update one repo at once. When merging internally, should we update both `workspace2.bzl`s in the same CL?
 Is there an ETA on the merge for this PR. https://github.com/tensorflow/tensorflow/pull/60002 build is dependent on this PR being merged. @pgpetrak I guess you're still the reviewer for this? I'm going to remove myself as reviewer if you can take care of this. @reedwm Yes, you're correct. Tensorflow isn't using the OpenXLA version of XLA (yet! we should have that working soon). Because of that, we have to change both workspace files at the same time, which can only be done with an internal CL.
This PR is to update the cudnn frontend version to v0.8. The release note is [here](https://github.com/NVIDIA/cudnn-frontend/releases/tag/v0.8).


cc. @pjannaty @nluehr 