feat:(fieldmask) support black-list mode

[AsterDY]

Description

Feature

• add option Options.BlackListMode to decide if it is a black list when NewFieldMask()
• add logics in FieldMask.InMask():
  • if the ID is not set (not in black list), return true
  • if the ID is set but the value has children ( Intermediate node in a black path), return true
  • if the ID is set but the value has no child ( terminating node in a black path), return false
• add API FieldMask.GetPath() to search child of a fieldmask
• add API FieldMask.ForEachChild() to iterate over all children of a fieldmask

Bugfix

• fix: handle Enum kind not correctly when making fieldmask
• fix: not pass sub-fieldmask when code generating for ReadFieldList

Motivation and Context

• 业务需要支持黑名单模式
• 业务需要知道特定 Thrift Path 下的包含的所有标记

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