ADAP-973: Fix issue where materialized views were being mapped as vie… #4132

Job	Run time
test-metadata	5s
redshift / python 3.8 / ubuntu-latest	25m 47s
redshift / python 3.9 / ubuntu-latest	26m 17s
redshift / python 3.10 / ubuntu-latest	25m 13s
redshift / python 3.11 / ubuntu-latest	23m 8s
redshift / python 3.8 / windows-latest	26m 0s
redshift / python 3.8 / macos-latest	36m 0s
post-failure	1s
require-label-comment	0s
	2h 42m 31s

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