[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/resolve/overloadConflicts/withVariance.kt

@@ -7,4 +7,4 @@ class A<T>
 <!CONFLICTING_OVERLOADS!>fun <T1> A<T1>.foo()<!> = X1
 <!CONFLICTING_OVERLOADS!>fun <T2> A<out T2>.foo()<!> = X2
 
-fun <T> A<out T>.test() = <!NI;OVERLOAD_RESOLUTION_AMBIGUITY, OI;CANNOT_COMPLETE_RESOLVE!>foo<!>() // TODO fix constraint system
+fun <T> A<out T>.test() = <!CANNOT_COMPLETE_RESOLVE{OI}, OVERLOAD_RESOLUTION_AMBIGUITY{NI}!>foo<!>() // TODO fix constraint system