[jdk17u-dev] RFR: 8308116: jdk.test.lib.compiler.InMemoryJavaCompiler.compile does not close files

[Goetz Lindenmaier]

I backport this for parity with 17.0.10-oracle.

Resolved Copyright, will mark as clean.

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Commit messages:
 - Backport e9320f31dcc4ff5197e8c3bca504a7d5c1a9035e

Changes: https://git.openjdk.org/jdk17u-dev/pull/1840/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1840&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8308116
  Stats: 33 lines in 1 file changed: 15 ins; 15 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1840.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1840/head:pull/1840

PR: https://git.openjdk.org/jdk17u-dev/pull/1840