RFR: 8375242: [macos] Improve jpackage signing coverage [v3]

[Alexey Semenyuk]

> Refactor signing tests covering gaps listed in the [CR description](https://bugs.openjdk.org/browse/JDK-8375242).
> 
> Old test signatures:
> 
> SigningAppImageTest.test(true, true, ASCII_INDEX)
> SigningAppImageTest.test(true, true, UNICODE_INDEX)
> SigningAppImageTest.test(true, false, UNICODE_INDEX)
> SigningAppImageTest.test(false, true, INVALID_INDEX)
> 
> SigningAppImageTwoStepsTest.test(true, true)
> SigningAppImageTwoStepsTest.test(true, false)
> SigningAppImageTwoStepsTest.test(false, true)
> 
> SigningPackageTest.test(true, true, true, ASCII_INDEX)
> SigningPackageTest.test(true, true, true, UNICODE_INDEX)
> SigningPackageTest.test(false, true, true, UNICODE_INDEX)
> SigningPackageTest.test(false, true, false, UNICODE_INDEX)
> SigningPackageTest.test(false, false, true, UNICODE_INDEX)
> 
> SigningPackageTwoStepTest.test(app-image={--mac-signing-key-user-name: CertificateRequest[name=Developer ID Application: jpackage.openjdk.java.net, ...]}; {MAC_DMG={--mac-signing-key-user-name: CertificateRequest[name=Developer ID Application: jpackage.openjdk.java.net, ...]}, MAC_PKG={--mac-signing-key-user-name: CertificateRequest[name=Developer ID Installer: jpackage.openjdk.java.net, ...]}})
> SigningPackageTwoStepTest.test({MAC_DMG={--mac-signing-key-user-name: CertificateRequest[name=Developer ID Application: jpackage.openjdk.java.net, ...]}, MAC_PKG={--mac-signing-key-user-name: CertificateRequest[name=Developer ID Installer: jpackage.openjdk.java.net, ...]}})
> SigningPackageTwoStepTest.test(app-image={--mac-signing-key-user-name: CertificateRequest[name=Developer ID Application: jpackage.openjdk.java.net, ...]})
> SigningPackageTwoStepTest.test(app-image={--mac-app-image-sign-identity: CertificateRequest[name=Developer ID Application: jpackage.openjdk.java.net, ...]}; {MAC_DMG={--mac-app-image-sign-identity: CertificateRequest[name=Developer ID Application: jpackage.openjdk.java.net, ...]}, MAC_PKG={--mac-installer-sign-identity: CertificateRequest[name=Developer ID Installer: jpackage.openjdk.java.net, ...]}})
> SigningPackageTwoStepTest.test({MAC_DMG={--mac-app-image-sign-identity: CertificateRequest[name=Developer ID Application: jpackage.openjdk.java.net, ...]}, MAC_PKG={--mac-installer-sign-identity: CertificateRequest[name=Developer ID Installer: jpackage.openjdk.java.net, ...]}})
> SigningPackageTwoStepTest.test(app-image={--mac-app-image-sign-identity: CertificateRequest[name=Developer ID Application: jpackage.openjdk.java.net, ...]})
> 
> SigningRuntimeImagePackageTest.test(true, INVALID_INDEX,...

Alexey Semenyuk has updated the pull request incrementally with two additional commits since the last revision:

 - Revert "SigningBase: move to the "base""
   
   This reverts commit b50c717d83096b67ff530d90715d87fa0d9ade20.
 - SigningBase: move to the "base"

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/29205/files
  - new: https://git.openjdk.org/jdk/pull/29205/files/8224f5e5..0deb3b69

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29205&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29205&range=01-02

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/29205.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29205/head:pull/29205

PR: https://git.openjdk.org/jdk/pull/29205