[test] Move irJsText tests to irText directory

So that all irText tests could be found in one place

compiler/testData/ir/irText/js/dynamic/dynamicBinaryEqualityOperator.kt.txt

@@ -0,0 +1,16 @@
+fun testEqeq(d: dynamic): Boolean {
+  return d == 3
+}
+
+fun testExclEq(d: dynamic): Boolean {
+  return d != 3
+}
+
+fun testEqeqeq(d: dynamic): Boolean {
+  return d === 3
+}
+
+fun testExclEqeq(d: dynamic): Boolean {
+  return d !== 3
+}
+