RFR: 8354559: gc/g1/TestAllocationFailure.java doesn't need WB API

[Leonid Mesnik]

Just minor clean up of WB API usage.
Also changed othervm to driver.

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Commit messages:
 - use driver
 - 8354559: gc/g1/TestAllocationFailure.java doesn't need WB API

Changes: https://git.openjdk.org/jdk/pull/24642/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24642&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8354559
  Stats: 5 lines in 1 file changed: 0 ins; 3 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/24642.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24642/head:pull/24642

PR: https://git.openjdk.org/jdk/pull/24642