[test] Move irJsText tests to irText directory

So that all irText tests could be found in one place

compiler/testData/ir/irText/js/dynamic/dynamicCall.kt

@@ -0,0 +1,8 @@
+// FIR_IDENTICAL
+fun test1(d: dynamic) = d.member(1, 2, 3)
+
+fun test2(d: dynamic) = d?.member(1, 2, 3)
+
+// Named arguments in dynamic calls are ignored by JS back-end.
+// If this becomes a compilation error, simply remove this particular test case.
+fun test3(d: dynamic) = d.member(a = 1, b = 2, c = 3)