[jdk11u-dev] RFR: 8254350: CompletableFuture.get may swallow InterruptedException

[luchenlin]

I backport this for parity with 11.0.20-oracle.
src/java.base/share/classes/java/util/concurrent/CompletableFuture.java
Resolved due to context
test/jdk/java/util/concurrent/CompletableFuture/LostInterrupt.java
Resolved due to context
test/jdk/java/util/concurrent/CompletableFuture/SwallowedInterruptedException.java
Resolved due to context

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Commit messages:
 - Backport 43dc3f79923a70306eaf91f77392b7dbb99f1fd1

Changes: https://git.openjdk.org/jdk11u-dev/pull/1964/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1964&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8254350
  Stats: 178 lines in 3 files changed: 170 ins; 5 del; 3 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1964.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/1964/head:pull/1964

PR: https://git.openjdk.org/jdk11u-dev/pull/1964