tiup bench: modify command from --output to --output-dir

[Oreoxmt]

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• This PR is translated from: tiup bench: modify command from --output to --output-dir docs-cn#10942
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• Delete files
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[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• shichun-0415

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[JaySon-Huang]

LGTM

[Oreoxmt]

/status LGT1

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #10038.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #10039.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #10040.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #10041.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #10042.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #10043.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #10044.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #10045.