cranelift: Cleanup SIMD icmp tests (#5530)

* cranelift: Enable more SIMD tests

* cranelift: Reorganize icmp tests

* cranelift: Enable SIMD icmp tests for unsigned ops

* cranelift: Cleanup trailing newlines

cranelift/filetests/filetests/runtests/simd-icmp-ugt-i64x2.clif

@@ -0,0 +1,17 @@
+test interpret
+test run
+target aarch64
+target s390x
+
+; TODO: Move this to the main file once x86_64 supports this operation
+; See: #5529
+
+function %simd_icmp_ugt_i64(i64x2, i64x2) -> i64x2 {
+block0(v0: i64x2, v1: i64x2):
+    v2 = icmp ugt v0, v1
+    return v2
+}
+; run: %simd_icmp_ugt_i64([0 1], [0 0]) == [0 -1]
+; run: %simd_icmp_ugt_i64([-1 0], [-1 1]) == [0 0]
+; run: %simd_icmp_ugt_i64([-5 1], [-1 -1]) == [0 0]
+; run: %simd_icmp_ugt_i64([0 0], [0 0]) == [0 0]