RFR: 8345432: (ch, fs) Replace anonymous Thread with InnocuousThread [v3]

[Brian Burkhalter]

> Change internal instances of anonymous `Thread`s to instances of `InnocuousThread`.

Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:

  8345432: Add uninterruptible InnocuousThread for Windows PipeImpl

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Changes:
  - all: https://git.openjdk.org/jdk/pull/22697/files
  - new: https://git.openjdk.org/jdk/pull/22697/files/7a421c1d..aa5bb8a1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22697&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22697&range=01-02

  Stats: 32 lines in 2 files changed: 22 ins; 3 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/22697.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22697/head:pull/22697

PR: https://git.openjdk.org/jdk/pull/22697