8380051: Update commonmark-java to 0.27.1

[hns]

Please review a change to update commonmark-java used for Markdown documentation comments to version 0.27.1.

https://github.com/commonmark/commonmark-java/tree/commonmark-parent-0.27.1

The code in jdk.internal.org.commonmark and subpackages is updated to the release code with minimal changes:

• Add GPL license header for new files
• Add jdk.internal package prefix
• Add a few missing @SuppressWarnings and @Deprecated annotations to avoid warnings during compilation

Our MarkdownTransformer adapter class required some changes as a method we previously implemented to resolve JavaDoc references was deprecated and replaced by a different method.

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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

Issue

• JDK-8380051: Update commonmark-java to 0.27.1 (Task - P3)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/30630/head:pull/30630
$ git checkout pull/30630

Update a local copy of the PR:
$ git checkout pull/30630
$ git pull https://git.openjdk.org/jdk.git pull/30630/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 30630

View PR using the GUI difftool:
$ git pr show -t 30630

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/30630.diff

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Link to Webrev Comment

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Applicable Labels

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• i18n
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[hns]

/label javadoc

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Webrevs

• 00: Full (69ae876d)