RFR: 8278422: Replace use of deprecated single string variant of Runtime.exec method

Tue May 9 14:17:21 UTC 2023

Calls of `Runtime.getRuntime().exec()` were changed to `String[]` variant.

Only Windows and macOS parts were affected, tests work good on both platforms.

I looked through the code and didn't find any other cases of `Runtime.getRuntime().exec(String)` being used, so that should cover all possible deprecation warnings for this issue.

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Commit messages:
 - Replace deprecated Runtime.exec method

Changes: https://git.openjdk.org/jfx/pull/1130/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1130&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8278422
  Stats: 9 lines in 1 file changed: 5 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jfx/pull/1130.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1130/head:pull/1130

PR: https://git.openjdk.org/jfx/pull/1130