:sparkles: Update UploadPart impl

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 44.44444% with 15 lines in your changes are missing coverage. Please review.

Project coverage is 25.00%. Comparing base (3ab33a8) to head (f0bbc94).

Files	Patch %	Lines
pkg/storage/s3/s3.go	44.44%	10 Missing and 5 partials :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #361 +/- ## ========================================== - Coverage 25.52% 25.00% -0.52% ========================================== Files 275 273 -2 Lines 19346 19017 -329 ========================================== - Hits 4938 4756 -182 + Misses 13945 13825 -120 + Partials 463 436 -27 ``` | [Flag](https://app.codecov.io/gh/go-sigma/sigma/pull/361/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-sigma) | Coverage Δ | | |---|---|---| | [unit-test-mysql](https://app.codecov.io/gh/go-sigma/sigma/pull/361/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-sigma) | `25.00% <44.44%> (-0.52%)` | :arrow_down: | | [unit-test-postgresql](https://app.codecov.io/gh/go-sigma/sigma/pull/361/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-sigma) | `25.00% <44.44%> (-0.52%)` | :arrow_down: | | [unit-test-sqlite3](https://app.codecov.io/gh/go-sigma/sigma/pull/361/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-sigma) | `25.00% <44.44%> (-0.52%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-sigma#carryforward-flags-in-the-pull-request-comment) to find out more.

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