[software] Adapt runtime to multicluster #1823

Job	Run time
check-control-registers	22s
riscv-isa-sim	8s
check-opcodes	4s
tc-gcc	24s
tc-llvm	49s
verilator	11s
verilator-model (minpool)	6s
verilator-model (mempool)	6s
build-apps-gcc (minpool)	1m 5s
check-bootrom	38s
build-apps-gcc (mempool)	1m 4s
unit-test	2m 11s
tc-halide	12s
build-apps-llvm (minpool)	53s
build-apps-llvm (mempool)	55s
build-apps-halide (minpool)	40s
build-apps-halide (mempool)	36s
run-apps-gcc (minpool)	38s
run-apps-gcc (mempool)	2m 35s
run-apps-llvm (minpool)	29s
run-apps-llvm (mempool)	2m 38s
run-apps-halide (minpool)	33s
run-apps-halide (mempool)	3m 21s
clean-up	2s
clean-up-compile-runs (minpool)	4s
clean-up-compile-runs (mempool)	3s
	20m 47s

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