9179 Refactoring accelerator content

[grainnejenningsRH]

• Updates the Working with accelerators title to reorganise and surface partner content, and include the Enabling NVIDIA GPUs steps (previously only included under Managing resources.
• Updates the title of the NVIDIA GPU enablement content to explicitly mention NVIDIA, and updates titles/links/include statements that used the originals.
• Adds notes specifying that only NVIDIA GPUs are supported as accelerators for model serving.
• Cuts some duplicate accelerator profile content from the Intel Gaudi integration module.
• Adds a file and a commented-out include statement for later updates.

Merge criteria:

• The commits are squashed in a cohesive manner and have meaningful messages.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work

[chtyler]

Looks great, but I think we capitalize "Operators"?