Add --fast-build dev-iteration build mode (prototype) #6682

Job	Run time
Detect File Changes	17s
Lint Gate	40s
Case Opt \| ${{ matrix.cluster_name }} (${{ matrix.device }}-${{ matrix.interface }})	0s
Github (ubuntu, mpi, no-debug, GNU)	34m 28s
Github (ubuntu, mpi, reldebug, intel)	20m 28s
Github (ubuntu, mpi, no-debug, intel)	1h 13m 56s
NVHPC 23.11 (cpu)	1h 31m 57s
Github (macos, mpi, no-debug, GNU)	58m 53s
NVHPC 24.1 (cpu)	1h 27m 45s
${{ matrix.cluster_name }} (${{ matrix.device }}${{ (((matrix.interface != 'none') && format('-{0}', matrix.interface)) \|\| '') }}${{ (((matrix.shard != '') && format(' [{0}]', matrix.shard)) \|\| '') }})	0s
Github (ubuntu, mpi, no-debug, GNU)	1h 39m 47s
Github (macos, mpi, reldebug, GNU)	31m 33s
NVHPC 24.5 (cpu)	1h 29m 11s
Github (ubuntu, mpi, reldebug, GNU)	53m 20s
NVHPC 24.7 (cpu)	1h 27m 53s
NVHPC 24.7 (gpu)	1h 15m 38s
NVHPC 23.11 (gpu)	1h 21m 0s
NVHPC 25.3 (cpu)	1h 28m 32s
NVHPC 24.9 (gpu)	1h 16m 21s
NVHPC 24.11 (cpu)	1h 29m 56s
NVHPC 25.3 (gpu)	1h 32m 48s
NVHPC 25.1 (gpu)	1m 11s
NVHPC 25.7 (cpu)	1h 29m 32s
NVHPC 25.1 (cpu)	1h 28m 48s
NVHPC 25.7 (gpu)	1h 30m 29s
NVHPC 25.5 (gpu)	1h 40m 23s
NVHPC 24.9 (cpu)	1h 29m 33s
NVHPC 26.1 (cpu)	1h 30m 9s
NVHPC 24.3 (cpu)	1h 13m 14s
NVHPC 25.9 (cpu)	1h 29m 24s
NVHPC 24.5 (gpu)	1h 3m 57s
NVHPC 24.3 (gpu)	1h 7m 32s
NVHPC 26.1 (gpu)	1h 40m 29s
NVHPC 24.11 (gpu)	50m 17s
NVHPC 26.3 (cpu)	1h 28m 43s
NVHPC 26.3 (gpu)	1h 33m 26s
NVHPC 24.1 (gpu)	1h 21m 6s
NVHPC 25.9 (gpu)	1h 46m 40s
NVHPC 25.11 (cpu)	1h 28m 7s
NVHPC 25.5 (cpu)	1h 29m 45s
NVHPC 25.11 (gpu)	1h 48m 51s
	2d 0h 5m 59s

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