[LL] support search for decompiled fir for type parameters

^ KTIJ-25976

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/typeParameter.kt

@@ -0,0 +1,4 @@
+// DECLARATION_TYPE: org.jetbrains.kotlin.psi.KtTypeParameter
+class FooBar<T> {
+    fun doSmth(t: T) {}
+}

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/typeParameter.txt

@@ -0,0 +1,8 @@
+KT element: KtTypeParameter
+KT element text:
+T
+FIR element: FirTypeParameterImpl
+FIR source kind: KtRealSourceElementKind
+
+FIR element rendered:
+[ResolvedTo(BODY_RESOLVE)] T