reactor&remove: 重构applications模块 & 移除applications、perms中已不再使用的模块 (#5374)

* reactor: 重构applications模块 & 删除applications、perms中已不再使用的模块

 * reactor: 1. 针对application.attrs字段的view-serializer映射逻辑，采用DynamicMapping的方案重写;
 * reactor: 2. 删除applications和perms模块中已不再使用的database-app/k8s-app/remote-app模块;

* reactor: 添加迁移文件(删除perms/databaseperrmission/remoteapppermission/k8sapppermission)

* reactor: 修改细节

Co-authored-by: Bai <bugatti_it@163.com>

apps/perms/serializers/base.py

@@ -1,13 +0,0 @@
-from rest_framework import serializers
-
-
-class PermissionAllUserSerializer(serializers.Serializer):
-    user = serializers.UUIDField(read_only=True, source='id')
-    user_display = serializers.SerializerMethodField()
-
-    class Meta:
-        only_fields = ['id', 'username', 'name']
-
-    @staticmethod
-    def get_user_display(obj):
-        return str(obj)