[RSDK-9754] Remove webcam discovery logic

[randhid]

In an effort to make RSDK-9630 slightly smaller - I broke out the webcam Discovery removal into its own work since it is isolated.

I tested the app on my Mac - nothing broke. We get no response in the video_path field and it connects to the first camera it finds.

I will wait until we have a discovery card to merge this in.

The replacement find-cameras module

TODO:

• Test on a pi.

[hexbabe]

Is webcam_e2e_test ran anywhere in CI? Is this the one we saw didn't run a while back with Julie?

Also thanks for the @ I will note the merge conflicts that inevitably arise in #4604

[randhid]

Is webcam_e2e_test ran anywhere in CI? Is this the one we saw didn't run a while back with Julie?

Also thanks for the @ I will note the merge conflicts that inevitably arise in #4604

Nope! I Want me to remove the e2e test as well?

[hexbabe]

wtf happened here I tried to merge THESE changes into my branch but I think it went both ways

[randhid]

wtf happened here I tried to merge THESE changes into my branch but I think it went both ways

It is perfectly okay I can deal with the conflicts - still waiting for the discovery card to be in - which should be tomorrow!

[hexbabe]

It's ok I can revert it to the previous commit. (sigh time to go back to rand-rdk)

[hexbabe]

OK I did what I set out to do, which is to merge these changes into #4604 and test & update aforementioned PR to be ready for review and merge after this one is merged (to avoid conflicts).