RFR: 8326611: Clean up vmTestbase/nsk/stress/stack tests [v6]

[Leonid Mesnik]

> The vmTestbase/nsk/stress/stack might be slightly refactored to improve reading. Mostly, simple refactoring.
> Test logic was not changed, except removing verbose mode and enabling printing.

Leonid Mesnik has updated the pull request incrementally with one additional commit since the last revision:

  Terminator is removed.

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/17993/files
  - new: https://git.openjdk.org/jdk/pull/17993/files/8caa23cc..6c78f883

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17993&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17993&range=04-05

  Stats: 173 lines in 2 files changed: 0 ins; 172 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/17993.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17993/head:pull/17993

PR: https://git.openjdk.org/jdk/pull/17993