Add .gitignore to tests for in-tree "cmake ." builds #2654

Job	Run time
cancel-prior-workflows	3s
start-workflow	1s
filter-jobs-on-changes	3s
create-conda-env-as4	0s
setup-complete	0s
documentation-check	0s
commit-on-master-check	0s
prepare-chipyard-constellation	0s
build-extra-tests	0s
prepare-chipyard-cores	0s
prepare-chipyard-peripherals	0s
prepare-chipyard-fpga	0s
prepare-chipyard-accels	0s
prepare-chipyard-other	0s
prepare-chipyard-tracegen	0s
chipyard-boomv3-run-tests	0s
chipyard-boomv4-run-tests	0s
chipyard-constellation-run-tests	0s
chipyard-hetero-run-tests	0s
chipyard-prefetchers-run-tests	0s
chipyard-rocket-run-tests	0s
chipyard-shuttle-run-tests	0s
chipyard-cva6-run-tests	0s
chipyard-dmirocket-run-tests	0s
chipyard-dmiboomv3-run-tests	0s
chipyard-ibex-run-tests	0s
chipyard-radiance-run-tests	0s
chipyard-shuttle3-run-tests	0s
chipyard-sodor-run-tests	0s
chipyard-spike-run-tests	0s
chipyard-tacit-rocket-run-tests	0s
chipyard-vexiiriscv-run-tests	0s
chipyard-dmiboomv4-run-tests	0s
chipyard-gemmini-run-tests	0s
chipyard-llcchiplet-run-tests	0s
chipyard-manymmioaccels-run-tests	0s
chipyard-manyperipherals-run-tests	0s
chipyard-mempress-run-tests	0s
chipyard-rerocc-run-tests	0s
chipyard-rocketvector-run-tests	0s
chipyard-shuttlevector-run-tests	0s
chipyard-spiflashwrite-run-tests	0s
chipyard-spike-gemmini-run-tests	0s
chipyard-symmetric-run-tests	0s
chipyard-tethered-run-tests	0s
constellation-run-tests	0s
icenet-run-tests	0s
rocketchip-run-tests	0s
testchipip-run-tests	0s
chipyard-compressacc-run-tests	0s
tracegen-boomv3-run-tests	0s
tracegen-boomv4-run-tests	0s
tracegen-run-tests	0s
all tests passed	0s
	7s

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