Remove worker Flight SQL prepared metadata handlers (#731) #662

Job	Run time
build (macos-latest, darwin, arm64)	1m 27s
build (ubuntu-latest, linux, amd64)	1m 30s
build (ubuntu-24.04-arm, linux, arm64)	1m 29s
build (macos-15, darwin, amd64)	1m 54s
release	51s
	7m 11s

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