RFR: 8370237: AssertionError in Annotate.fromAnnotations with -Xdoclint and type annotations

[Liam Miller-Cushon]

Hi, please consider this fix for a crash with `-Xdoclint` and type annotations. It is a generalization of a previous fix for [JDK-8266082](https://bugs.openjdk.org/browse/JDK-8266082).

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Commit messages:
 - 8370237: AssertionError in Annotate.fromAnnotations with -Xdoclint and type annotations

Changes: https://git.openjdk.org/jdk/pull/27901/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27901&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8370237
  Stats: 28 lines in 3 files changed: 28 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/27901.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27901/head:pull/27901

PR: https://git.openjdk.org/jdk/pull/27901