Allow 2D simulations with meep in X- and Y- normal planes #1744

Job	Run time
Test meep ubuntu-latest 3.11	2m 12s
Test klayout ubuntu-latest 3.12	31s
Test palace ubuntu-latest 3.11	52s
Test vlsir ubuntu-latest 3.12	27s
Test femwell ubuntu-latest 3.12	34s
Test path_length_analysis ubuntu-latest 3.12	45s
pre-commit	16s
Test meow ubuntu-latest 3.12	47s
Test sax ubuntu-latest 3.12	41s
test_code_coverage	1m 47s
Test tidy3d ubuntu-latest 3.12	47s
	9m 39s

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