RFR: 8377514: jpackage: support passing multiple exceptions to the top-level error handler

[Alexey Semenyuk]

On Tue, 10 Feb 2026 01:06:29 GMT, Alexey Semenyuk <asemenyuk at openjdk.org> wrote:

> Make the top-level error reporter handle suppressed exceptions.
> 
> The bundling code may use the suppressed exceptions mechanism to report multiple error conditions.
> 
> Rework reporting of multiple signing identity errors using the new mechanism, simplified `MacFromOptions.createMacPkgPackage()`.
> 
> Additionally:
>  - Simplified AppImageSigningConfigBuilder and SigningIdentityBuilder

@sashamatveev PTAL

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PR Comment: https://git.openjdk.org/jdk/pull/29643#issuecomment-3875237258