FIR IDE: move analysis api fir testdata to the analysis directory

analysis/analysis-api/testData/ktDeclarationAndFirDeclarationEqualityChecker/extensionMethods.kt

@@ -0,0 +1,7 @@
+fun kotlin.String.fromString(what: kotlin.Int, oops: kotlin.collections.Map<MyType<kotlin.Boolean>, kotlin.collections.MutableList<kotlin.Boolean>>): kotlin.Unit {}
+
+fun <T : kotlin.Number >kotlin.String.foo(what: kotlin.Int): kotlin.String { TODO() }
+
+fun <T> kotlin.String.withWhere(what: kotlin.Int): T where T : kotlin.Number, T: kotlin.Comparable<kotlin.Number> { TODO() }
+
+class MyType<in F>

analysis/analysis-api/testData/ktDeclarationAndFirDeclarationEqualityChecker/functionalTypes.kt

@@ -0,0 +1 @@
+fun ((kotlin.String) -> kotlin.Int?).foo(other: kotlin.String.() -> kotlin.Unit?): kotlin.Function2<kotlin.Int, kotlin.String, kotlin.Unit> { TODO() }

analysis/analysis-api/testData/ktDeclarationAndFirDeclarationEqualityChecker/inClass.kt

@@ -0,0 +1,11 @@
+class A<S> {
+    fun x(a: kotlin.Int, b: kotlin.String): Unit {}
+
+    fun <T> x(a: kotlin.Int, b: java.lang.String): kotlin.Int { TODO() }
+
+    fun <T, Q> x(a: kotlin.collections.Map<T, kotlin.collections.Map<in S, out Q>>, b: kotlin.collections.List<kotlin.Byte>): kotlin.Int { TODO() }
+
+    fun <T, Q> kotlin.collections.List<kotlin.collections.Map<T, Q>>.x(f: MyType<S>): kotlin.Int { TODO() }
+}
+
+class MyType<in F>