fix: add cloudfront keyvaluestore to sigV4a trait customization #2716

Job	Run time
all-platforms (ubuntu-latest)	17m 14s
all-platforms (macos-latest)	24m 14s
all-platforms (windows-latest)	23m 7s
jvm (8)	5m 40s
jvm (11)	5m 13s
jvm (17)	5m 27s
jvm (21)	5m 35s
	1h 26m 30s

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