[Analysis API FIR] fix NPE of == call resolve without builtins

We should not expect builtins to be always available as they are taken from indecies.

For K1　and FIR Standalone implementations, the builtins are always available.

^KT-62957 fixed

analysis/analysis-api/testData/components/callResolver/resolveCall/noBuiltIns.kt

@@ -0,0 +1,5 @@
+// NO_RUNTIME
+
+fun call() {
+    <expr>1 == 2</expr>
+}