[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/when/kt9972.fir.kt

@@ -1,4 +1,14 @@
 // !WITH_NEW_INFERENCE
+/*
+ * KOTLIN DIAGNOSTICS SPEC TEST (POSITIVE)
+ *
+ * SPEC VERSION: 0.1-152
+ * PRIMARY LINKS: expressions, when-expression -> paragraph 2 -> sentence 1
+ * expressions, when-expression, exhaustive-when-expressions -> paragraph 2 -> sentence 1
+ * expressions, when-expression -> paragraph 9 -> sentence 1
+ * expressions, conditional-expression -> paragraph 4 -> sentence 1
+ * expressions, conditional-expression -> paragraph 5 -> sentence 1
+ */
 
 fun test1(): Int {
     val x: String = if (true) {
@@ -16,4 +26,4 @@ fun test2(): Int {
                         else -> null
                     } ?: return 0
     return x.hashCode()
-}
+}