RFR: 7903774: make all tests combinations printing nicer and/or configurable

[Jiří Vaněk]

This is still WIP, but already on row what [CODETOOLS-7903774](https://bugs.openjdk.org/browse/CODETOOLS-7903774) suggested.

It will be finished once all desired output combinations are included, but already now is doing the usage of listing much more comfortable and code readable.

From:

`TESTS` - as introduced by https://github.com/openjdk/jcstress/pull/149
`COMBINATIONS` - as introduced in https://github.com/openjdk/jcstress/pull/149 verbose mode (thus surpassing the `-v` impact
`ALL_TESTS` - all tests as it was before https://github.com/openjdk/jcstress/pull/149
`COMBINATIONS_GROUPED ` - as suggested in https://github.com/openjdk/jcstress/pull/149#discussion_r1668678910
`COMBINATIONS_JSON` same as combinations, but a valid json
`COMBINATIONS_GROUPS` same as COMBINATIONS_GROUPED only instead of enumeration in each group, only count of members will be printed 


* TESTS are already implemented as ALL_MATCHING
* COMBINATIONS as ALL_MATCHING_COMBINATIONS
* ALL_TESTS as ALL

COMBINATIONS_GROUPED, and COMBINATIONS_GROUPS are under development.
The _JSON variants are tobe decided, but ability to JQL it sounds nice.

Suggestion to better names welcomed.

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

Commit messages:
 - Refactored lsiting so it takes proper argument
 - refactored listTests() to its own class

Changes: https://git.openjdk.org/jcstress/pull/153/files
  Webrev: https://webrevs.openjdk.org/?repo=jcstress&pr=153&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7903774
  Stats: 132 lines in 4 files changed: 101 ins; 21 del; 10 mod
  Patch: https://git.openjdk.org/jcstress/pull/153.diff
  Fetch: git fetch https://git.openjdk.org/jcstress.git pull/153/head:pull/153

PR: https://git.openjdk.org/jcstress/pull/153