♻️ 重构 GeneratorPostgresqlMapper 命名优化支持 PG数据库

(cherry picked from commit 335549fc99d945c74d01205ea756cfd2cffc6225)

pigx-visual/pigx-codegen/src/main/resources/mapper/GeneratorPostgresqlMapper.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 
-<mapper namespace="com.pig4cloud.pigx.codegen.mapper.GeneratorPgMapper">
+<mapper namespace="com.pig4cloud.pigx.codegen.mapper.GeneratorPostgresqlMapper">
 
 	<select id="queryTable" resultType="map">
 		SELECT