Fixed presign url signing

[vugarli]

Fixes #1150

• Now headers gets included in the signature appropriately
• Did some cleanup

[ebozduman]

@vugarli
Please look into your build failure (1st build test failure) and format-check test (2nd build failure).
For format check, you basically run dotnet regitlint in your branch and push the suggested format changes in.

[vugarli]

@vugarli Please look into your build failure (1st build test failure) and format-check test (2nd build failure). For format check, you basically run dotnet regitlint in your branch and push the suggested format changes in.

Done. Will look into functional test failing, play.min.io seems to be down for now

[ebozduman]

@vugarli

Yes, play.min.io was down. The issue is resolved now and it is up and running.

The failure is about your changes: System.InvalidOperationException: Unable to download via presigned URL Content

[vugarli]

@ebozduman
I have changed the test to reflect the new behavior of signing. Old one used to include headers as query parameters, which was the reason test was passing before