RFR: 8356047: [macos] jpackage produces confusing post- and pre- installation PKG scripts

[Alexander Matveev]

- Removed all code from pre- and post- installation PKG scripts.
- This code is not needed and PKG should create destination folder and set correct permissions.
- If for some reason it is not happens, permissions issues should be fixed when jpackage prepares application bundle. PKG should keep all permissions unchanged when packaging and installing bundle.
- pre- and post- installation PKG scripts are kept as empty scripts, so user can override them if needed.
- `INSTALL_LOCATION` and `APP_LOCATION` substitution is removed, since `$1` argument in scripts is same as `INSTALL_LOCATION`.
- I think code in these scripts are some legacy leftovers.

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Commit messages:
 - 8356047: [macos] jpackage produces confusing post- and pre- installation PKG scripts

Changes: https://git.openjdk.org/jdk/pull/25510/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25510&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8356047
  Stats: 17 lines in 3 files changed: 0 ins; 17 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/25510.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25510/head:pull/25510

PR: https://git.openjdk.org/jdk/pull/25510