Update isooctane_lu mechanism to allow it to be generated (#431) #1038

Job	Run time
Formatting	4m 46s
CEPTR (3.10, 1.4.2)	1m 33s
Codespell	30s
Transport-EOS-Reactions (gnu, 3.10, 1.4.2)	12m 12s
Transport-EOS-Reactions (llvm, 3.10, 1.4.2)	9m 48s
Transport-EOS-Reactions (cuda, 3.10, 1.4.2)	5m 11s
Transport-EOS-Reactions (hip, 3.10, 1.4.2)	12m 56s
Transport-EOS-Reactions (sycl, 3.10, 1.4.2)	20m 53s
	1h 7m 49s

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