Switch to the Cleaner API

[otbutz]

Fixes #1465

• replaced the current implementation that relies on finalize() by using a Cleaner instead
• the ResourceTracker no longer holds a reference to the resource, as the Cleaner API mandates that:

  The cleaning action is invoked only after the associated object becomes phantom reachable, so it is important that the object implementing the cleaning action does not hold references to the object.

• a flag is now used to detect whether the nonDisposedReporter should be invoked.
• the tracker is registered during init() to avoid false-negatives for resources throwing an exception in their constructor. e.g new Cursor(display, -100)

[github-actions]

Test Results

   486 files  ±0     486 suites  ±0   9m 47s ⏱️ - 1m 1s
 4 306 tests ±0   4 293 ✅ ±0   13 💤 ±0  0 ❌ ±0 
16 408 runs  ±0  16 300 ✅ ±0  108 💤 ±0  0 ❌ ±0 

Results for commit 81ee856. ± Comparison against base commit 49fd6b0.

[otbutz]

We can pass our own ThreadFactory to have a nicer thread name, but IMHO this adds too much complexity for what it's worth.