Reformat example data names: use {region}_data for 1-day data, and {region}_data_1min for 1-min data

[cning112]

Description

Use the same name for 1min data

Motivation and Context

The same data has two names, meaning the same data needs to be downloaded twice to run some examples.

How Has This Been Tested?

• not needed

Screenshots of Test Results (if appropriate):

1. Pipeline test:
2. Your own tests:

Types of changes

• Fix bugs
• Add new feature
• Update documentation

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[you-n-g]

@cning112 Thanks for your contribution.

I found a lot of commands with different format

Would you like to format them to the same path?
For example, qlib_cn_1min is a good name.

[you-n-g]

Besides ...

Users from the community will be grateful to you :P

[cning112]

sure, will make the change in the next commit. Thanks

[cning112]

Actually I think the qlib_ prefix can be removed from the example data names. {region}_{freq} should suffice. What do you think? @you-n-g

[you-n-g]

@cning112 Yes. Removing the redundant prefix make it simpler
Besides making it simpler, it will be better to make the name consistent with the previous directory to be compatible.
I think keeping "~/.qlib/qlib_data/cn_data" for 1-day data will be more friendly to old users

[you-n-g]

@cning112 Please check the Paths in CI workflows
https://github.com/microsoft/qlib/tree/main/.github/workflows

Thanks

[you-n-g]

It looks great! Thanks so much!