RFR: JDK-8306952: improve generic signature of internal DCInlineTag class

[Iris Clark]

On Wed, 26 Apr 2023 21:03:16 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

> Please review a small update to the generic signature of the internal `DCInlineTag` class, to improve its use in chained method calls.

Marked as reviewed by iris (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/13678#pullrequestreview-1403028187