RFR: 8317937: @sealedGraph: Links to inner classes fails in links

[Per Minborg]

On Fri, 20 Oct 2023 17:22:10 GMT, Chen Liang <liach at openjdk.org> wrote:

> This fixes the links to nested classes like `ValueLayout.OfLong` in the rendered sealed class hierarchy graph.
> 
> A similar problem with nested classes exist for `@sealedGraph` on them, where their graphs will be generated to a wrong directory and the graph link broken, as seen in `StringTemplate.Processor.Linkage`. That will be done in a separate RFE.

LGTM

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Marked as reviewed by pminborg (Committer).

PR Review: https://git.openjdk.org/jdk/pull/16292#pullrequestreview-1691789929