test(e2e/v2): add transfer-from-dfdaemon option for dfget test case

[gaius-qi]

Description

This pull request introduces new test contexts for downloading files using dfget with the transfer-from-dfdaemon option in the test/e2e/v2/dfget_test.go file. The changes include adding tests for 1MiB and 10MiB file downloads.

New test contexts for dfget:

• Added context for downloading a 1MiB file using dfget with transfer-from-dfdaemon option. This includes setup and teardown steps, as well as validation of the downloaded file's SHA256 checksum.
• Added context for downloading a 10MiB file using dfget with transfer-from-dfdaemon option. This includes setup and teardown steps, as well as validation of the downloaded file's SHA256 checksum.

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 35.80%. Comparing base (3973340) to head (5b8b8e6).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##           main    #3832       +/-   ##
=========================================
+ Coverage      0   35.80%   +35.80%     
=========================================
  Files         0      337      +337     
  Lines         0    38991    +38991     
=========================================
+ Hits          0    13961    +13961     
- Misses        0    24111    +24111     
- Partials      0      919      +919     

Flag	Coverage Δ
unittests	35.80% <ø> (?)

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

see 337 files with indirect coverage changes

[chlins]

lgtm