[XTABLE-CI] Add labeler workflow

[wuchunfu]

What is the purpose of the pull request

Using labeler to automatically label new pull requests based on the paths of files being changed. The label of PR can make people clearly know what it does.

By the way, the .github/labeler.yml file contains a list of labels and minimatch globs to match to apply the label. We can add more labels, such as CI/CD, docs, UT, and enrich this list.

[ghost]

CI report:

• 6a4ef2d2bba5f8a52e11bf962d123d9fb682dedf Azure: SUCCESS

Bot commands

@xtable-bot supports the following commands:

• @xtable-bot run azure re-run the last Azure build

[wuchunfu]

@the-other-tim-brown PTAL, thanks