observation.survey is being removed from the L1/L2 metadata; find an appropriate replacement in the L3 metadata

[schlafly]

observation.survey is being removed from the L1/L2 metadata here:

rad/src/rad/resources/schemas/observation-1.0.0.yaml

Lines 201 to 213 in 9cb5a40

	survey:
	title: Observation Survey
	description: |
	The available survey options for observations are: HLS = High Latitude
	Wide Area Survey, EMS = Galactic Bulge Time Domain Survey, SN = High
	Latitude Time Domain Survey, N/A = General Astrophysics Surveys or other
	survey not otherwise defined here.
	type: string
	enum: [HLS, EMS, SN, N/A]
	maxLength: 15
	archive_catalog:
	datatype: nvarchar(15)
	destination: [WFIExposure.survey, GuideWindow.survey]

We currently also include that in the L3 metadata:

rad/src/rad/resources/schemas/mosaic_basic-1.0.0.yaml

Lines 104 to 110 in 9cb5a40

	survey:
	title: Observation Survey
	type: string
	maxLength: 15
	archive_catalog:
	datatype: nvarchar(15)
	destination: [WFIMosaic.survey, SourceCatalog.survey, SegmentationMap.survey]

We should find an appropriate replacement when the L3 metadata is updated. We removed this because of redundancy with things like program.subcategory, so there are likely obvious replacements, but this ticket is intended to remind us to make sure that that update occurs.