Deprecated API Warnings

[skinny85]

Description

If an element in the CDK Construct Library (class, interface, property, function, etc.) is deprecated, using it inside a CDK application should produce a warning in the CDK CLI for all commands that perform synthesis (cdk synth, cdk diff, cdk deploy, etc.).

This will aid in the migration from CDK V1 to V2.

Roles

Role	User
Author(s)	@skinny85
API Bar Raiser	@eladb

See RFC Process for details

Workflow

• [x] Tracking issue created (label: status/proposed)
• [x] API bar raiser assigned (ping us at #aws-cdk-rfcs if needed)
• [x] Kick off meeting
• [x] RFC pull request submitted (label: status/review)
• [x] Community reach out (via Slack and/or Twitter)
• [x] API signed-off (label api-approved applied to pull request)
• [x] Final comments period (label: status/final-comments-period)
• [x] Approved and merged (label: status/approved)
• [x] Execution plan submitted (label: status/planning)
• [x] Plan approved and merged (label: status/implementing)
• [x] Implementation complete (label: status/done)

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Author is responsible to progress the RFC according to this checklist, and apply the relevant labels to this issue so that the RFC table in README gets updated.

[eladb]

@skinny85 has this been implemented already?

[skinny85]

@eladb no, it has not - the design has been approved in the RFC, but the implementation work has not started.