RFR: 8310157: Allow void-returning filters for MethodHandles::collectCoordinates

[Jorn Vernee]

This patch changes the implementation of `MethodHandles::collectCoordinates` to allow using filters that return `void`. This brings the behavior in line with the previously existing `MethodHandles::collectArgument` which operates on MethodHandles rather than VarHandles.

Testing: jdk-tier1,2,3

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Commit messages:
 - allow void-returning filters for collectCoordinates

Changes: https://git.openjdk.org/jdk/pull/14496/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14496&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310157
  Stats: 23 lines in 3 files changed: 9 ins; 7 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/14496.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14496/head:pull/14496

PR: https://git.openjdk.org/jdk/pull/14496