RFR: 8261096: Convert jlink tool to use Stream.toList()

[Ian Graves]

A subtask [JDK-8260559](https://bugs.openjdk.java.net/browse/JDK-8260559). This is an enhancement to update jlink's usage of `Collections.toList()` to `Stream.toList()`.

-------------

Commit messages:
 - Converting jlink usage of Collections.toList() to Stream.toList

Changes: https://git.openjdk.java.net/jdk/pull/2416/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2416&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8261096
  Stats: 18 lines in 8 files changed: 0 ins; 5 del; 13 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2416.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2416/head:pull/2416

PR: https://git.openjdk.java.net/jdk/pull/2416