[jdk21u-dev] RFR: 8342934: TYPE_USE annotations printed with error causing "," in toString output [v2]

[Liam Miller-Cushon]

> This backport of [JDK-8342934](https://bugs.openjdk.org/browse/JDK-8342934) fixes a bug in `TypeMirror#toString` output.

Liam Miller-Cushon has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge remote-tracking branch 'origin/master' into backport-JDK-8342934
 - Backport ff165f9f0cf519144d7361b766bcce53d04c518e

-------------

Changes:
  - all: https://git.openjdk.org/jdk21u-dev/pull/1802/files
  - new: https://git.openjdk.org/jdk21u-dev/pull/1802/files/bb0ed0fc..abfaf118

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1802&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1802&range=00-01

  Stats: 9025 lines in 905 files changed: 5356 ins; 2147 del; 1522 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1802.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1802/head:pull/1802

PR: https://git.openjdk.org/jdk21u-dev/pull/1802