Fix #1516: Support @JsonManagedReference/@JsonBackReference for property-based creators

[JacksonJang]

Issue: #1516

I resolved the issue where @JsonManagedReference and @JsonBackReference annotations didn't work when used with property-based creators (@ConstructorProperties).

In addition, I added a test case in TestKotlinGithub129 to verify the fix.
This test is based on testGithub129() in TestGithub149 class from [jackson-module-kotlin].

[JacksonJang]

@cowtowncoder
I added conditional logic to ManagedReferenceProperty._setBackReference() and consolidated duplicate code into a single shared method.
When you have a moment, please take a look.

if (value == null) {
  return;
}