Remove stream when initializing user state storage

[github-actions[bot]]

Test Results

 50 files  ±0   50 suites  ±0   6m 58s :stopwatch: ±0s 758 tests ±0  751 :white_check_mark: ±0  7 :zzz: ±0  0 :x: ±0  759 runs  ±0  752 :white_check_mark: ±0  7 :zzz: ±0  0 :x: ±0 

Results for commit 7b7fdabf. ± Comparison against base commit 4b2431d7.

This pull request removes 6 and adds 6 tests. Note that renamed tests count towards both.

``` dev.restate.sdk.TestSerdesTest ‑ Byte: -18 dev.restate.sdk.TestSerdesTest ‑ Double: 0.8719117441110397 dev.restate.sdk.TestSerdesTest ‑ Float: 0.1676408 dev.restate.sdk.TestSerdesTest ‑ Integer: 1513765697 dev.restate.sdk.TestSerdesTest ‑ Long: -3436473880572258966 dev.restate.sdk.TestSerdesTest ‑ Short: 15559 ``` ``` dev.restate.sdk.TestSerdesTest ‑ Byte: -44 dev.restate.sdk.TestSerdesTest ‑ Double: 0.3830294201334613 dev.restate.sdk.TestSerdesTest ‑ Float: 0.050215364 dev.restate.sdk.TestSerdesTest ‑ Integer: -14404751 dev.restate.sdk.TestSerdesTest ‑ Long: 9165094029353224795 dev.restate.sdk.TestSerdesTest ‑ Short: -5512 ```

:recycle: This comment has been updated with latest results.