RFR: 8344833: CTW: Make failing on zero classes optional [v2]

[Evgeny Nikitin]

> For CTW, zero classes in provided jar is now a failure.
> This creates noisy and blocking false positives in fuzzy/mass scale runs, where we use jar archives from random sources, unchecked or randomly generated, etc.
> 
> This PR makes this behaviour controllable. Default reaction is a failure, like before.

Evgeny Nikitin has updated the pull request incrementally with one additional commit since the last revision:

  Update test/hotspot/jtreg/testlibrary/ctw/src/sun/hotspot/tools/ctw/CtwRunner.java
  
  Fix comment
  
  Co-authored-by: Tobias Hartmann <tobias.hartmann at oracle.com>

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/22320/files
  - new: https://git.openjdk.org/jdk/pull/22320/files/286c47e0..a091e15d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22320&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22320&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/22320.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22320/head:pull/22320

PR: https://git.openjdk.org/jdk/pull/22320