Changed to use custom s5cmd build w go 1.24.2 to address CVEs

[smouaa]

Also added new integration tests for DJL CPU container to workflow

Description

Brief description of what this PR is about

• If this change is a backward incompatible change, why must this change be made?
• Interesting edge cases to note here

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Checklist:

• Please add the link of Integration Tests Executor run with related tests.
• Have you manually built the docker image and verify the change?
• Have you run related tests? Check how to set up the test environment here; One example would be pytest tests.py -k "TestVllm1" -m "vllm"
• Have you added tests that prove your fix is effective or that this feature works?
• Has code been commented, particularly in hard-to-understand areas?
• Have you made corresponding changes to the documentation?

Feature/Issue validation/testing

Please describe the Unit or Integration tests that you ran to verify your changes and relevant result summary. Provide instructions so it can be reproduced.
Please also list any relevant details for your test configuration.

• Test A
  Logs for Test A

• Test B
  Logs for Test B

[xyang16]

You need to add TestSagemakerCompatibility to https://github.com/deepjavalibrary/djl-serving/blob/master/tests/integration/tests.py

[smouaa]

Should I also add TestXgbSkl and TestCustomFormatters to tests.py? I was told to separate them into different files because it made tests.py very long

[xyang16]

I see, it doesn't work if it's not in tests.py though. But please double check.

[xyang16]

One thing you can do is to import TestSagemakerCompatibility, TestXgbSkl and TestCustomFormatters in tests.py if you want to keep them separate.

[xyang16]

Could you please run the nightly before merge?