ilm: Handle DeleteAllVersions action differently for DEL markers (#19481)

i.e., this rule element doesn't apply to DEL markers.

This is a breaking change to how ExpiredObejctDeleteAllVersions
functions today. This is necessary to avoid the following highly probable
footgun scenario in the future.

Scenario:
The user uses tags-based filtering to select an object's time to live(TTL). 
The application sometimes deletes objects, too, making its latest
version a DEL marker. The previous implementation skipped tag-based filters
if the newest version was DEL marker, voiding the tag-based TTL. The user is
surprised to find objects that have expired sooner than expected.

* Add DelMarkerExpiration action

This ILM action removes all versions of an object if its
the latest version is a DEL marker.

```xml
<DelMarkerObjectExpiration>
    <Days> 10 </Days>
</DelMarkerObjectExpiration>
```

1. Applies only to objects whose,
  • The latest version is a DEL marker.
  • satisfies the number of days criteria
2. Deletes all versions of this object
3. Associated rule can't have tag-based filtering

Includes,
- New bucket event type for deletion due to DelMarkerExpiration

internal/bucket/lifecycle/rule_test.go

@@ -105,6 +105,31 @@ func TestInvalidRules(t *testing.T) {
 	                    </Rule>`,
 			expectedErr: errXMLNotWellFormed,
 		},
+		{
+			inputXML: `<Rule>
+				<ID>Rule with a tag and DelMarkerExpiration</ID>
+				<Filter><Tag><Key>k1</Key><Value>v1</Value></Tag></Filter>
+				<DelMarkerExpiration>
+					<Days>365</Days>
+				</DelMarkerExpiration>
+                            <Status>Enabled</Status>
+	                    </Rule>`,
+			expectedErr: errInvalidRuleDelMarkerExpiration,
+		},
+		{
+			inputXML: `<Rule>
+				<ID>Rule with multiple tags and DelMarkerExpiration</ID>
+				<Filter><And>
+				<Tag><Key>k1</Key><Value>v1</Value></Tag>
+				<Tag><Key>k2</Key><Value>v2</Value></Tag>
+				</And></Filter>
+				<DelMarkerExpiration>
+					<Days>365</Days>
+				</DelMarkerExpiration>
+                            <Status>Enabled</Status>
+	                    </Rule>`,
+			expectedErr: errInvalidRuleDelMarkerExpiration,
+		},
 	}
 
 	for i, tc := range invalidTestCases {