[new-parser] Merge dev-new-parser to main

[tkobayas]

#5678 (comment)

As of 2024-07-11, dev-new-parser unit tests are all green. Remaining child issues are low priority, so they can be handled after merging to main.

The next step is to create a PR to merge dev-new-parser branch to main branch. Notes:

• Merging has to be done after Drools 10.0 release.
• Until the Drools 10.0 release, mark the PR [DO-NOT-MERGE] and make it draft.
• Create 2 PRs.
  • One makes the new parser not default parser. So it shouldn't affect the default behavior. It is the one to be merged. Make sure to use "Rebase and merge" (not "Squash and merge") in the Github UI to keep commit history.
  • The other makes the new parser default parser (with a system property switch). It is in order to check any regression error. It's not to be merged, so draft PR.
• After Drools 10 release, discuss the future plan in dev at kie.apache ML.
• Change sysout ### parse : ANTLR4_PARSER_ENABLED = to debug log