#0: Fix get_dispatch_core_config in conftest.py to not modify the device_params to not affect subsequent tests

[tt-aho]

Changed to a new function get_updated_device_params that returns a new updated copy of device_params instead

Ticket

Link to Github Issue

Problem description

get_dispatch_core_config was modifying the device_params dict in place by popping elements out of the dict for dispatch core axis. If we run 2 tests parametrized on core axis being col for example, the first test would see this set to col and pop it, but then the second test would see this set to the default (row), resulting in incorrect behaviour.

What's changed

Changed get_dispatch_core_config to get_updated_device_params which does not modify the original device_params dict, and instead returns a new copy with the updated parameters.

Checklist

• Post commit CI passes https://github.com/tenstorrent/tt-metal/actions/runs/12470990472
• Blackhole Post commit (if applicable)
• Model regression CI testing passes (if applicable)
• Device performance regression CI testing passes (if applicable)
• (For models and ops writers) Full new models tests passes
• New/Existing tests provide coverage for changes