add tiflash config storage.temp

[guo-shaoge]

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[guo-shaoge]

related tiflash pr: pingcap/tiflash#10035

[windtalker]

lgtm

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[Oreoxmt]

Suggested change

	- 从 v9.0.0 版本开始，不推荐使用 `tmp_path`。推荐使用 [`storage.temp`](#storage.temp-从-v900-版本开始引入)下的配置项代替，因为新的配置项支持设置 capacity 限制临时文件使用的空间。
	- 当 `storage.temp` 配置存在时，会忽略 `tmp_path`。
	- 从 v9.0.0 开始，不推荐使用 `tmp_path`。建议使用 [`storage.temp`](#storage.temp-从-v900-版本开始引入) 中的配置项替代，因其支持设置容量限制，控制临时文件的空间使用。
	- 当 `storage.temp` 配置存在时，`tmp_path` 配置会被忽略。

[Oreoxmt]

Suggested change

	- 用于存储查询落盘文件。
	- 指定用于存储查询结果的落盘文件路径。

[Oreoxmt]

Suggested change

	- 默认使用 [`storage.latest.dir`](#dir-1) 的第一个目录\] + "/tmp"
	- 默认使用 \[[`storage.latest.dir`](#dir-1) 的第一个目录\] + "/tmp"

[Oreoxmt]

Suggested change

	- 用于限制临时文件目录所能使用的总空间。如果查询落盘过程中落盘文件超过该值，则会报错结束。
	- 限制临时文件目录的总空间使用量。如果查询过程中生成的落盘文件超过该限制，将导致错误并中止操作。

[Oreoxmt]

Suggested change

	- 单位：Byte。目前不支持如 `"10GB"` 的设置。范围：[0, 9223372036854775807]。
	- 单位：Byte。目前不支持类似 `"10GB"` 的格式。
	- 范围：`[0, 9223372036854775807]`

[Oreoxmt]

Suggested change

	- 如果不设置该值或者将该值设置为 0，表示不限制临时文件所占用的空间，落盘文件可以使用整个硬盘容量。
	- 如果未设置该值或将其设置为 `0`，表示不限制临时文件的空间使用，落盘文件可以使用整个硬盘的容量。

[Oreoxmt]

Suggested change

	- 如果该值大于 0，TiFlash 启动时会做如下检查：
	- 如果设置了大于 `0` 的值，TiFlash 在启动时会执行以下检查：

[Oreoxmt]

Suggested change

	- 如果 `storage.temp.dir` 是 `storage.main.dir` 的子目录，且 `storage.main.capacity` 大于 0，则 `storage.temp.capacity` 必须小于等于 `storage.main.capacity`。（同理如果是 `storage.latest.dir` 的子目录，也会做类似的检查）。
	- 如果 `storage.temp.dir` 是 `storage.main.dir` 的子目录，且 `storage.main.capacity` 大于 `0`，则 `storage.temp.capacity` 必须小于等于 `storage.main.capacity`。同理，如果是 `storage.latest.dir` 的子目录，也会进行类似检查。