Improve conformance backward version support

Turn off ARGMAX rank 6 tests for v0.60.0

Signed-off-by: Jeremy Johnson <jeremy.johnson@arm.com>
Change-Id: I535b7887a9db099d39ad943e151f870ebc716791
diff --git a/verif/conformance/tosa_main_profile_ops_info.json b/verif/conformance/tosa_main_profile_ops_info.json
index 054b9d4..0b6dc79 100644
--- a/verif/conformance/tosa_main_profile_ops_info.json
+++ b/verif/conformance/tosa_main_profile_ops_info.json
@@ -794,6 +794,7 @@
         ],
         "generation": {
             "standard": {
+                "from_version": "v0.80.0",
                 "generator_args": [
                     [
                         "--target-dtype",