feat(cdk): add KeyValueExtractor #2836

Job	Run time
Get Changes	3s
Check: 'source-hardcoded-records' (skip=false)	4m 45s
Check: 'source-amplitude' (skip=false)	9m 13s
Check: 'source-shopify' (skip=false)	10m 27s
Check: 'destination-motherduck' (skip=true)	6s
Check: 'source-google-drive' (skip=true)	3s
Check: 'source-pokeapi' (skip=false)	3m 18s
	27m 55s

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