refactor: update rm_resp from str to enum #762

Job	Run time
s1_s2_mpi (3.10, linear, rma)	2m 21s
s3_dates (3.9)	1m 35s
s1_s2 (3.9, linear, rma, asdf, false)	1m 46s
s3_dates (3.10)	1m 31s
s1_s2 (3.9, robust, rma, asdf, false)	1m 46s
unit_tests_win	5m 59s
s1_s2 (3.9, nroot, rma, asdf, false)	1m 37s
unit_tests	4m 31s
s1_s2 (3.9, selective, rma, asdf, false)	1m 40s
s1_s2 (3.9, auto_covariance, rma, asdf, false)	1m 40s
s1_s2 (3.9, pws, rma, asdf, false)	1m 39s
s1_s2 (3.10, linear, rma, asdf, false)	1m 41s
s1_s2 (3.10, robust, rma, asdf, false)	1m 45s
s1_s2 (3.10, nroot, rma, asdf, false)	1m 42s
s1_s2 (3.10, selective, rma, asdf, false)	1m 46s
s1_s2 (3.10, auto_covariance, rma, asdf, false)	1m 37s
s1_s2 (3.10, pws, rma, asdf, false)	1m 32s
s1_s2 (linear, 3.10, no, zarr, true)	1m 39s
s1_s2 (all, 3.9, phase_only, numpy)	1m 37s
	39m 24s

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