Bumped J2N to 2.2.0-alpha-0048

[NightOwl888]

• You've read the Contributor Guide and Code of Conduct.
• You've included unit or integration tests for your change, where applicable.
• You've included inline docs for your change, where applicable.
• There's an open issue for the PR that you are making. If you'd like to propose a change, please open an issue to discuss the change or find an existing issue.

Related to #1284 and #1311

Bumped J2N to 2.2.0-alpha-0048 so we can integrate the latest features

Details

This upgrades to a version of J2N that contains the new CountdownLatch implementation that allows signaling after reaching 0 without throwing exceptions.

It also removes the one call to dynamic because the support for it was removed from J2N in NightOwl888/J2N#181 as part of #1278. That same PR also significantly improved the performance of Aggressive mode, so we can simply use string.Format(J2N.Text.StringFormatter.InvariantCulture, "{0}", collection) to format collections. It also correctly handles IStructuralFormattable, which all J2N collections implement to improve performance.

NOTE: This also updates LuceneTestCase.DumpEnumerator() to use the above approach rather than calling Collections.ToString(), since the types involved may be broader than collections and StringFormatter handles all known differences in formatting between .NET and Java.