[SYCL] Discard unsupported platforms output in sycl-ls test

[jchlanda]

Make sure that the devices that belong to unsupported platforms are not counted, this is required to match the number of devices when sycl-ls is run in and out of the verbose mode.

[jchlanda]

This patch fixes a post-commit issue discovered here: #15166 (comment)

[sarnex]

@intel/unified-runtime-reviewers Ping on this one, it will fix postcommit :)

[jchlanda]

@intel/llvm-gatekeepers we should be ready to roll on this one.

Thank you!

[steffenlarsen]

@jchlanda - For some odd reason, Windows Build seems to be broken after this. It seems to be in building libclc, but I don't understand how this could have affected it. Either way, could you please have a look?

[sarnex]

The error looks insane, I'm trying a rebuild on a different runner to see if the runner was busted.

[sarnex]

Nope, failed again here. I'll try to investigate.

[sarnex]

I'm still looking and @uditagarwal97 is helping. This might be the weirdest one I've seen.

[uditagarwal97]

I'm still looking and @uditagarwal97 is helping. This might be the weirdest one I've seen.

It's fixed now. It was an infrastructure related issue.

[jchlanda]

I'm still looking and @uditagarwal97 is helping. This might be the weirdest one I've seen.

It's fixed now. It was an infrastructure related issue.

off the hook :)
Thank you!