Don't run AOCC parallel tests with -j2 #1096

Job	Run time
Autotools Debug Workflows / GCC-debug-TS=disabled	12m 14s
Autotools Parallel Workflows / Parallel GCC-debug	3m 52s
Autotools Parallel Special Workflows / gcc DBG parallel -Werror (build only)	3m 56s
Autotools Parallel Special Workflows / gcc REL parallel -Werror (build only)	4m 9s
Autotools Debug Thread-Safety Workflows / GCC-debug-TS=enabled	3m 47s
Autotools aocc Workflows / aocc production	15m 5s
Autotools Cygwin Workflows / cygwin production	25m 16s
Autotools Intel Workflows / linux-oneapi production	13m 28s
Autotools nvhpc Workflows / nvhpc production	10m 21s
Autotools Release Workflows / GCC-production-TS=disabled	12m 4s
Autotools Parallel Workflows / Parallel GCC-production	5m 43s
Autotools Release Thread-Safety Workflows / GCC-production-TS=enabled	4m 29s
Autotools Special Workflows / gcc DBG v1.6 default API (build only)	4m 49s
Autotools Special Workflows / gcc DBG v1.8 default API (build only)	4m 59s
Autotools Special Workflows / gcc DBG -Werror (build only)	4m 31s
Autotools Special Workflows / gcc no deprecated symbols (build only)	4m 51s
Autotools Special Workflows / gcc DBG v1.10 default API (build only)	5m 2s
Autotools Special Workflows / gcc DBG v1.12 default API (build only)	5m 22s
Autotools Special Workflows / gcc DBG v1.14 default API (build only)	4m 44s
Autotools Special Workflows / gcc REL -Werror (build only)	5m 3s
Autotools TestExpress Workflows / Autotools production Express Test Workflows	12m 26s
Autotools TestExpress Workflows / Autotools debug Express Test Workflows	13m 51s
	3h 0m 2s

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