[CCL] Add separate CMakeLists.txt for CCL ops

[Aswinmcw]

Ticket

#15636

Problem description

Needs separate CMakeLists.txt for CCL ops

What's changed

Add separate CMakeLists.txt for CCL ops

Checklist

• Post commit CI passes - https://github.com/tenstorrent/tt-metal/actions/runs/12139056025
• T3k pipelines - https://github.com/tenstorrent/tt-metal/actions/runs/12139058716
• Blackhole Post commit (if applicable)
• Model regression CI testing passes (if applicable)
• Device performance regression CI testing passes (if applicable)
• New/Existing tests provide coverage for changes

[SeanNijjar]

@ayerofieiev-tt - is it okay if we make reference to experimental files from within the main CCL build file?