[jdk11u-dev] RFR: 8276880: Remove java/lang/RuntimeTests/exec/ExecWithDir as unnecessary

[Christoph Langer]

Backport of JDK-8276880. I had to resolve since in 17u the file `test/jdk/java/lang/RuntimeTests/exec/ExecWithDir.java` was deleted which was renamed from `test/jdk/java/lang/Runtime/exec/ExecWithDir.java` in JDK 14 via
[JDK-8225054](https://github.com/openjdk/jdk/commit/827e5e32264666639d36990edd5e7d0b7e7c78a9): Compiler implementation for records.

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Commit messages:
 - Backport fcc1cc626b5133c6361b5ae6cce8809e922d971f

Changes: https://git.openjdk.org/jdk11u-dev/pull/1866/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1866&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8276880
  Stats: 61 lines in 1 file changed: 0 ins; 61 del; 0 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1866.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/1866/head:pull/1866

PR: https://git.openjdk.org/jdk11u-dev/pull/1866