test: fix s3 integration test

[glorv]

What problem does this PR solve?

Fix s3 integration test by setting the source dir to the right s3 address.

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

Related changes

[lichunzhu]

/run-all-tests

[glorv]

/merge

[ti-srebot]

/run-all-tests