[TD] Update diagnostics test data due to new test runners

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

compiler/testData/diagnostics/tests/smartCasts/comparisonUnderAnd.kt

@@ -16,12 +16,12 @@ fun foo(x : String?, y : String?) {
     else {
         // y == null but x != y
         <!DEBUG_INFO_SMARTCAST!>x<!>.length
-        <!OI;DEBUG_INFO_CONSTANT!>y<!><!UNSAFE_CALL!>.<!>length
+        <!DEBUG_INFO_CONSTANT{OI}!>y<!><!UNSAFE_CALL!>.<!>length
     }
     if (y == null && x != <!DEBUG_INFO_CONSTANT!>y<!>) {
         // y == null but x != y
         <!DEBUG_INFO_SMARTCAST!>x<!>.length
-        <!OI;DEBUG_INFO_CONSTANT!>y<!><!UNSAFE_CALL!>.<!>length
+        <!DEBUG_INFO_CONSTANT{OI}!>y<!><!UNSAFE_CALL!>.<!>length
     }
     else {
         x<!UNSAFE_CALL!>.<!>length
@@ -36,4 +36,4 @@ fun foo(x : String?, y : String?) {
         <!DEBUG_INFO_SMARTCAST!>x<!>.length
         <!DEBUG_INFO_SMARTCAST!>y<!>.length
     }
-}
+}