8336942: Improve test coverage for class loading elements with annotations of different retentions

[cushon]

This change improves annotation processing test coverage, see JDK-8336942. I resolved a trivial merge conflict with JDK-8323684, which added the nameToAnnotation map. The modified test passes.

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8336942 needs maintainer approval

Issue

• JDK-8336942: Improve test coverage for class loading elements with annotations of different retentions (Enhancement - P4)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u-dev.git pull/1037/head:pull/1037
$ git checkout pull/1037

Update a local copy of the PR:
$ git checkout pull/1037
$ git pull https://git.openjdk.org/jdk21u-dev.git pull/1037/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 1037

View PR using the GUI difftool:
$ git pr show -t 1037

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk21u-dev/pull/1037.diff

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[bridgekeeper]

👋 Welcome back cushon! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[mlbridge]

Webrevs

• 00: Full (d059d1b6)