enhance: [skip e2e] remove missing related issue for small enhancement PR (#28503)

remove the missing-related-issue if the PR size is not large and be with
`kind/enhancement`

Signed-off-by: yah01 <yah2er0ne@outlook.com>

.github/mergify.yml

@@ -201,7 +201,11 @@ pull_request_rules:
                   - base=master
                   - base=sql_beta
                   - base~=^2(\.\d+){1,2}$
-              - label=kind/enhancement
+              - and:
+                - label=kind/enhancement
+                - -label=size/L
+                - -label=size/XL
+                - -label=size/XXL
     actions:
       label:
         remove: