POC: upgrade to constructs 4.x

[eladb]

This branch includes the work required to remove the constructs compatibility layer from the AWS CDK codebase.
See RFC: aws/aws-cdk-rfcs#195

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[mergify]

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[mergify]

Title does not follow the guidelines of Conventional Commits. Please adjust title before merge.

[aws-cdk-automation]

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• CodeBuild project: AutoBuildProject6AEA49D1-qxepHUsryhcu
• Commit ID: 8ed2437
• Result: SUCCEEDED
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[jogold]

@eladb took a look at the new AssetStaging class, if outdir is known at construction time we can directly bundle in it (which allows the optimization requested by #8882) and we don't need to moveSync at all (non bundled assets would still be copied if staging is enabled).

For another PR after this one?

cc @misterjoshua

[eladb]

@eladb took a look at the new AssetStaging class, if outdir is known at construction time we can directly bundle in it (which allows the optimization requested by #8882) and we don't need to moveSync at all (non bundled assets would still be copied if staging is enabled).

For another PR after this one?

cc @misterjoshua

Love it. Yes, I am hoping to back port most of this into the v1.x line and we'll be able to apply that there. Stay tuned.