Modernises the Meta-class and changes its faction to NT #13937

Job	Run time
Compile Maps	1m 20s
Windows Build	2m 59s
Run Linters	2m 19s
Integration Tests (BASIC_TESTS) / run_integration_tests	3m 21s
Integration Tests (CREATE_AND_DESTROY_TEST) / run_integration_tests	2m 57s
Integration Tests (RUIN_PLACEMENT_TEST) / run_integration_tests	5m 7s
Integration Tests (PLANET_GEN_TEST) / run_integration_tests	4m 58s
Integration Tests (SHIP_PLACEMENT_TEST) / run_integration_tests	11m 53s
	34m 54s

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