Extract flag values to config

[trey-stafford]

There are various flag values that are hard-coded where needed and should instead be extracted to a configuration to ensure consistency. See e.g.,

seaice_ecdr/seaice_ecdr/intermediate_daily.py

Lines 409 to 417 in 3ac991a

	# TODO: the flag value being "or"ed to the bitmask should be looked
	# up as the temporally-interpolation-has-occured value
	# rather than hardcoded as '128'.
	cde_ds_with_melt_onset["cdr_seaice_conc_qa"] = cde_ds_with_melt_onset[
	"cdr_seaice_conc_qa"
	].where(
	~is_melt_has_occurred,
	other=np.bitwise_or(cde_ds_with_melt_onset["cdr_seaice_conc_qa"], 128),
	)