M18 service and CICD updates

AWS code changes only

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changed milestone to %M18 - Release 0.21

added AWS no-detached-pipeline labels

requested review from @ydzeng, @marcburnie, @fhoueto.amz, and @gustavurda

assigned to @mmarabe

looks good, missing M18 label?

added 1 commit

• f511eac9 - update core lib snapshot version to 0.21.0-rc5

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added 1 commit

• 2edd2eb7 - remove reference to cicd feature branch

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approved this merge request

changed the description

mentioned in commit 6fbb46e7

merged

mentioned in commit c0e99ed9