feat: add DSL markers to codegenned structure builders (#1065) #2763

Job	Run time
downstream	6m 46s
jvm (8)	3m 25s
all-platforms (ubuntu-latest)	5m 34s
jvm (11)	3m 38s
all-platforms (macos-latest)	11m 51s
jvm (17)	3m 21s
protocol-tests	9m 40s
all-platforms (windows-latest)	7m 47s
jvm (21)	3m 29s
	55m 31s

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