doc: update 7.2 tutorial hardware and os configuration and add a doc to list supported hardware and OS

Sagar Arorarequested to merge
7.2-tutorial-update into develop
  1. The hardware details in the tutorial were very old; now we are using some new systems
  2. There is no need now to mention the old kernel version and firmware version
  3. I removed the configuration with tuned-adm, as it is confusing sometimes. So it is better to use just GRUB. I have an OAI tuned profile ready, but I will do it on another MR. I will check if it works well on kernel 7.X before pushing
  4. Add a document to list the tested/supported hardware on which we have tested OAI. In another MR I will use that document as reference for other tutorials as well.

Signed-off-by: Sagar Arora sagar.arora@openairinterface.org

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