[lworld] RFR: 8294927: [lworld] LambdaMetafactory class should reject identity and value superinterface

[Roger Riggs]

On Sat, 8 Oct 2022 02:12:08 GMT, Mandy Chung <mchung at openjdk.org> wrote:

> This PR adds the validation in LambdaMetafactory to reject if the return type of the given factory type is not an identity interface and not a value interface.   This also fixes a bug in `Class::isIdentity` to return false for interfaces if Valhalla is not enabled.

Marked as reviewed by rriggs (Committer).

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PR: https://git.openjdk.org/valhalla/pull/783