feat: add command to cancel data transfer

[simlecode]

关联的Issues (Related Issues)

close filecoin-project/venus#5766

改动 (Proposed Changes)

附注 (Additional Info)

自查清单 (Checklist)

在你认为本 PR 满足被审阅的标准之前，需要确保 / Before you mark the PR ready for review, please make sure that:

• 符合Venus项目管理规范中关于PR的相关标准 / The PR follows the PR standards set out in the Venus project management guidelines
• 具有清晰明确的commit message / All commits have a clear commit message.
• 包含相关的的测试用例或者不需要新增测试用例 / This PR has tests for new functionality or change in behaviour or not need to add new tests.
• 包含相关的的指南以及文档或者不需要新增文档 / This PR has updated usage guidelines and documentation or not need
• 通过必要的检查项 / All checks are green

[codecov-commenter]

Codecov Report

Merging #307 (4d4ed90) into master (012d2aa) will decrease coverage by 0.06%.
The diff coverage is 0.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #307      +/-   ##
==========================================
- Coverage   22.85%   22.79%   -0.06%     
==========================================
  Files         180      180              
  Lines       20733    20804      +71     
==========================================
+ Hits         4738     4742       +4     
- Misses      15220    15288      +68     
+ Partials      775      774       -1     

Flag	Coverage Δ
unittests	22.79% <0.00%> (-0.06%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cli/data_transfer.go	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes

[diwufeiwen]

LGTM