RFR: 8351095: [macos] Add more jpackage tests for --mac-app-store option

[Alexander Matveev]

Added following tests:
- Verify mac app store PKG doesn't have scripts (added to `PkgScriptsTest.java`).
- `--launcher-as-service` ignored for mac app store PKG  (added to `ServiceTest.java`).
- `--launcher-as-service` for additional launcher ignored for mac app store PKG (added to `ServiceTest.java`).

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Commit messages:
 - 8351095: [macos] Add more jpackage tests for --mac-app-store option

Changes: https://git.openjdk.org/jdk/pull/28487/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28487&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8351095
  Stats: 53 lines in 4 files changed: 35 ins; 0 del; 18 mod
  Patch: https://git.openjdk.org/jdk/pull/28487.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28487/head:pull/28487

PR: https://git.openjdk.org/jdk/pull/28487