8379830: The warnings for value-based classes need updating to include use of the Reference API

[liach]

The warnings for value-based classes does not mention the use of VBC instances in Reference objects. We are adding warnings for failures in JEP 401 integration; and it's beneficial for us to add something in 27 before JEP 401 lands in 28.

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
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• Change requires CSR request JDK-8389188 to be approved

Issues

• JDK-8379830: The warnings for value-based classes need updating to include use of the Reference API (Enhancement - P3)
• JDK-8389188: The warnings for value-based classes need updating to include use of the Reference API (CSR)

Reviewers

• Joe Darcy (@jddarcy - Reviewer) Review applies to a340a677
• David Holmes (@dholmes-ora - Reviewer)

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[openjdk]

@liach This change now passes all automated pre-integration checks.

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8379830: The warnings for value-based classes need updating to include use of the Reference API

Reviewed-by: dholmes, darcy

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[mlbridge]

Webrevs

• 01: Full - Incremental (6422ae64)
• 00: Full (a340a677)

[liach]

I wrote a CSR documenting the exact changes; please help review.

[dholmes-ora]

I would have expanded this part as well:

For example, synchronization may fail, or use as a referent object may throw an exception.

but it isn't critical.