chore: rename extensions in LuxCore (#1618) #1101

Job	Run time
test (common, default, true) / test	23m 10s
test (misc, default, false) / test	35m 12s
test (normalization, default, true) / test	39m 7s
test (common, default, false) / test	25m 58s
test (misc, default, true) / test	38m 23s
downgrade (common) / test	0s
downgrade (misc) / test	0s
downgrade (normalization) / test	0s
	2h 41m 50s

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