Enable bitstream generation with flat routing #6187

Job	Run time
Detect code changes	8s
Debug Build (Ubuntu 22.04)	30m 26s
Build w/o Yosys (Ubuntu 22.04)	19m 32s
Build Compatibility: GCC-9 (Ubuntu 22.04)	34m 28s
docker_regression_tests	0s
Build w/o Yosys plugin (Ubuntu 22.04)	34m 46s
Build Compatibility: GCC-10 (Ubuntu 22.04)	36m 23s
No-warning Build (Ubuntu 22.04)	33m 27s
Build Compatibility: GCC-11 (Ubuntu 22.04)	35m 12s
Build w/o test (Ubuntu 22.04)	33m 51s
Build Compatibility: GCC-12 (Ubuntu 22.04)	41m 23s
Build w/o version number (Ubuntu 22.04)	34m 36s
Build (GCC-11 on Ubuntu 20.04)	37m 2s
Build Compatibility: Clang-11 (Ubuntu 22.04)	39m 49s
Build w/o SWIG support (Ubuntu 22.04)	34m 41s
Build (Clang-10 on Ubuntu 20.04)	43m 27s
Build Compatibility: Clang-12 (Ubuntu 22.04)	41m 11s
Build Compatibility: Clang-13 (Ubuntu 22.04)	41m 12s
Build Compatibility: Clang-14 (Ubuntu 22.04)	40m 36s
Build docker image for distribution	28s
linux_regression_tests (basic_reg_yosys_only_test)	21s
linux_regression_tests (basic_reg_test)	19m 36s
linux_regression_tests (fpga_verilog_reg_test)	8m 57s
linux_regression_tests (fpga_bitstream_reg_test)	12m 58s
linux_regression_tests (fpga_sdc_reg_test)	32s
linux_regression_tests (fpga_spice_reg_test)	18s
linux_regression_tests (micro_benchmark_reg_test)	3m 32s
linux_regression_tests (quicklogic_reg_test)	14m 9s
linux_regression_tests (vtr_benchmark_reg_test)	10m 50s
linux_regression_tests (iwls_benchmark_reg_test)	11m 52s
linux_regression_tests (tcl_reg_test)	18s
	11h 36m 1s

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