[java] Adding native library loader to SessionOptions and RunOptions static init (#16435)
### Description
Unlike most ORT classes `SessionOptions` and `RunOptions` don't trigger
native library loading of the JNI binding and ORT when the classes are
initialized (after class loading). This was initially because I thought
that loading an inner class would trigger the static initialization of
the outer class, but this is not true. So if you create a
`SessionOptions` instance before referencing `OrtEnvironment` then you
won't trigger library loading and you'll get an error saying it couldn't
link the native method that creates a `SessionOptions` object.
Note this doesn't prevent users from creating a `SessionOptions` and
modifying it before the `OrtEnvironment` is created, which can still
cause issues. It would be a breaking API change to modify the
`SessionOptions` constructor to take an environment, and it wouldn't
mirror the way it works in the C API which requires this by convention
rather than API design, but we can discuss making that modification
later.
### Motivation and Context
Reduces the occurrence of mysterious Java library loading errors. Helps
with #16434.