[jdk17u-dev] RFR: 8292066: Convert TestInputArgument.sh and TestSystemLoadAvg.sh to java version

[Goetz Lindenmaier]

I backport this for parity with 17.0.7-oracle.

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Commit messages:
 - Backport 032be168b5a6af6f9e82deb8c8cafcd2c44b5447

Changes: https://git.openjdk.org/jdk17u-dev/pull/1137/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1137&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8292066
  Stats: 222 lines in 4 files changed: 54 ins; 142 del; 26 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1137.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/1137/head:pull/1137

PR: https://git.openjdk.org/jdk17u-dev/pull/1137