RFR: 8377514: jpackage: support passing multiple exceptions to the top-level error handler [v2]

[Alexey Semenyuk]

> 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

Alexey Semenyuk has updated the pull request incrementally with one additional commit since the last revision:

  Copyright year update

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Changes:
  - all: https://git.openjdk.org/jdk/pull/29643/files
  - new: https://git.openjdk.org/jdk/pull/29643/files/438ba70b..6ab4e521

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29643&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29643&range=00-01

  Stats: 4 lines in 4 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/29643.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29643/head:pull/29643

PR: https://git.openjdk.org/jdk/pull/29643