Update includes:
- Changing syntax of `OI/`NI` tags from `<!NI;TAG!>` to `<!TAG{NI}!>`
- Fix some incorrect directives
- Change order of diagnostics in some places
- Remove ignored diagnostics from FIR test data (previously `DIAGNOSTICS` didn't work)
- Update FIR dumps in some places and add `FIR_IDENTICAL` if needed
- Replace all JAVAC_SKIP with SKIP_JAVAC directive
CallableId for intersection overrides has been changed in previous commits
and many rendered FIR test data needs to be changed
But, we're going to get rid of callableId's/or fix them back for intersection overrides soon
Dmitriy Novozhilov