Previously, PropertiesLauncher would close each archive that it
iterated over when creating its ClassLoader. This was not aligned
with JarLauncher's behaviour and left the ClassLoader with closed
archives. The close was introduced in [1] and became more apparent
following the change to fail operations on closed archives [2].

This commit updates Launcher to remove the close() that was added in
[1]. This aligns the behavior of PropertiesLauncher with JarLauncher
and ensures that the ClassLoader does not have entries backed by
closed archives on its classpath.

Fixes gh-23165

[1] https://github.com/spring-projects/spring-boot/commit/ad72f86bdb9c2a889a76679767e9627de0f2543c
[2] https://github.com/spring-projects/spring-boot/commit/ed7a5db17441bdb37df8e90dc0fa6c52948c008e