RFR: 8297148: Add a @sealedGraph tag to CallSite

[Per Minborg]

This PR proposes to opt in for graphic rendering of the sealed hierarchy of the CallSite class.

Rendering capability was added via https://bugs.openjdk.org/browse/JDK-8295653

Here is how it would look like:

<img width="479" alt="CallSite_SH" src="https://user-images.githubusercontent.com/7457876/202234105-8029ade2-4feb-456c-a010-b80122195f0f.png">

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Commit messages:
 - Add a @sealedGraph tag to CallSite

Changes: https://git.openjdk.org/jdk/pull/11190/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11190&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8297148
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/11190.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11190/head:pull/11190

PR: https://git.openjdk.org/jdk/pull/11190