More refactoring of lookup module #202

Job	Run time
lock-gdal (ubuntu-latest, 3.8)	40s
lock-gdal (ubuntu-latest, 3.12)	47s
lock-gdal (macos-latest, 3.8)	1m 9s
lock-gdal (macos-latest, 3.12)	49s
lock-gdal (windows-latest, 3.8)	1m 34s
lock-gdal (windows-latest, 3.12)	1m 35s
install-gdal-with-conda (ubuntu-latest, 3.8)	57s
install-gdal-with-conda-lock (ubuntu-latest, 3.8)	1m 32s
install-gdal-with-conda (macos-latest, 3.8)	1m 14s
install-gdal-with-conda-lock (ubuntu-latest, 3.12)	1m 20s
install-gdal-with-conda (windows-latest, 3.8)	2m 37s
install-gdal-with-conda-lock (macos-latest, 3.8)	1m 57s
install-gdal-with-micromamba (ubuntu-latest, 3.8)	28s
install-gdal-with-conda-lock (macos-latest, 3.12)	2m 2s
install-gdal-with-micromamba (macos-latest, 3.8)	54s
install-gdal-with-micromamba (windows-latest, 3.8)	1m 16s
install-gdal-with-conda-lock (windows-latest, 3.8)	3m 55s
install-gdal-with-conda-lock (windows-latest, 3.12)	4m 15s
	29m 1s

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