RFR: 8338716: Re-visit "interrupt handling" in jdk.internal.loader.Resource

[Brent Christian]

The InterruptibleIO feature (which was only on Solaris) was removed some time ago. See [JDK-4385444](https://bugs.openjdk.org/browse/JDK-4385444).

Vestiges of it remain in jdk.internal.loader.Resource.getBytes(), and should be removed.

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Commit messages:
 - remove handling for defunct InterruptedIOException

Changes: https://git.openjdk.org/jdk/pull/20736/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20736&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8338716
  Stats: 33 lines in 1 file changed: 0 ins; 30 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/20736.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20736/head:pull/20736

PR: https://git.openjdk.org/jdk/pull/20736