[llvm] update_test_checks: add new --filter-all-after option (PR #129739)

[Florian Hahn via llvm-commits]

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@@ -151,6 +159,13 @@ def __call__(self, parser, namespace, values, option_string=None):
         metavar="REGEX",
         help="Exclude lines matching REGEX",
     )
+    filter_group.add_argument(
+        "--filter-all-after",
----------------
fhahn wrote:

The existing `--filter` is used to specify a filter to include lines matching it and `--filter-out` to exclude. Something like `--filter-out-after` may be more accurate?

https://github.com/llvm/llvm-project/pull/129739