refactor: remove dut/OpenLLC #349

Job	Run time
Verilator \| ubuntu-22.04 \| clang-16	6m 14s
Verilator \| ubuntu-22.04 \| gcc	5m 47s
Pre-Build \| L2-L3-L2 \| OOTB CoupledL2	3m 8s
Pre-Build \| L2-L3 \| OOTB CoupledL2	2m 56s
Build \| L2-L3-L2 \| ubuntu-22.04 \| gcc	1m 25s
Build \| L2-L3 \| ubuntu-22.04 \| clang-16	1m 19s
Build \| L2-L3 \| ubuntu-22.04 \| gcc	1m 6s
Build \| L2-L3-L2 \| ubuntu-22.04 \| clang-16	1m 32s
Run \| ${{ matrix.case.name }} \| ${{ matrix.case.mode }} \| ${{ matrix.os }} \| ${{ matrix.compiler.cc }}	-1s
	23m 26s

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