fix(测试跟踪): 功能用例责任人筛选不生效

--bug=1015202 --user=陈建星 【测试跟踪】功能用例列表页-责任人筛选不生效 https://www.tapd.cn/55049933/s/1208304

backend/src/main/java/io/metersphere/base/mapper/ext/ExtTestCaseMapper.xml

@@ -574,6 +574,10 @@
                             and test_case.version_id in
                             <include refid="io.metersphere.base.mapper.ext.ExtBaseMapper.filterInWrapper"/>
                         </when>
+                        <when test="key=='maintainer'">
+                            and test_case.maintainer in
+                            <include refid="io.metersphere.base.mapper.ext.ExtBaseMapper.filterInWrapper"/>
+                        </when>
                         <when test="key.startsWith('custom')">
                             and test_case.id in (
                                 select resource_id from custom_field_test_case where concat('custom',field_id) = #{key}