[lldb][test] Fix running TestWithLimitDebugInfo.py on Windows

When debug info categories were set for a test method with the
`@add_test_categories` decorator, they were all added to its
"categories" attribute. If some of these categories were not supported,
`LLDBTestResult.startTest()` skipped all variants of the test method.

For example, the tests in `TestWithLimitDebugInfo.py` use the categories
`dwarf` and `dwo`. However, since `dwo` is not supported on Windows, all
the tests in this file were skipped, even though the tests for `dwarf`
could be run.

Author: igorkudrin

lldb/packages/Python/lldbsuite/test/lldbtest.py

@@ -1775,16 +1775,20 @@ def no_reason(_):
                 attrvalue, "__no_debug_info_test__", False
             ):
                 # If any debug info categories were explicitly tagged, assume that list to be
-                # authoritative.  If none were specified, try with all debug
-                # info formats.
-                all_dbginfo_categories = set(
+                # authoritative.  If none were specified, try with all debug info formats.
+                test_method_categories = getattr(attrvalue, "categories", [])
+                dbginfo_categories = set(test_method_categories) & set(
                     test_categories.debug_info_categories.keys()
                 )
-                categories = (
-                    set(getattr(attrvalue, "categories", [])) & all_dbginfo_categories
-                )
-                if not categories:
-                    categories = [
+                if dbginfo_categories:
+                    other_categories = [
+                        category
+                        for category in test_method_categories
+                        if category not in dbginfo_categories
+                    ]
+                else:
+                    other_categories = test_method_categories
+                    dbginfo_categories = [
                         category
                         for category, can_replicate in test_categories.debug_info_categories.items()
                         if can_replicate
@@ -1796,16 +1800,16 @@ def no_reason(_):
                 skip_for_debug_info_cat_fn = getattr(
                     attrvalue, "__skip_for_debug_info_cat_fn__", no_reason
                 )
-                for cat in categories:
+                for cat in dbginfo_categories:
 
-                    @decorators.add_test_categories([cat])
                     @wraps(attrvalue)
                     def test_method(self, attrvalue=attrvalue):
                         return attrvalue(self)
 
                     method_name = attrname + "_" + cat
                     test_method.__name__ = method_name
                     test_method.debug_info = cat
+                    test_method.categories = other_categories + [cat]
 
                     xfail_reason = xfail_for_debug_info_cat_fn(cat)
                     if xfail_reason: