[FIR] Fix kotlin version check in annotations

@RequireKotlin has more than one string parameter, so you need to check
 'version' only

compiler/testData/diagnostics/tests/annotations/requireKotlin.fir.kt

@@ -0,0 +1,12 @@
+package kotlin.io
+
+import kotlin.internal.*
+
+@<!INVISIBLE_REFERENCE!>RequireKotlin<!>(<!ILLEGAL_KOTLIN_VERSION_STRING_VALUE!>"1.x"<!>)
+class IllegalVersion()
+
+@<!INVISIBLE_REFERENCE!>RequireKotlin<!>("1.2")
+class LegalMinimum()
+
+@<!INVISIBLE_REFERENCE!>RequireKotlin<!>("1.2", versionKind = <!INVISIBLE_REFERENCE!>RequireKotlinVersionKind<!>.COMPILER_VERSION, message = "Requires newer compiler version to be inlined correctly.")
+class LegalStdLib()