feat: small speed up to the unmarshaller

[bdraco]

• We can also drop the inner _read_array since the args are the same

[codecov[bot]]

Codecov Report

Patch coverage: 66.66% and project coverage change: -0.17% :warning:

Comparison is base (e8901a8) 82.80% compared to head (697c278) 82.64%. Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #238 +/- ## ========================================== - Coverage 82.80% 82.64% -0.17% ========================================== Files 28 28 Lines 3257 3255 -2 Branches 673 673 ========================================== - Hits 2697 2690 -7 - Misses 343 346 +3 - Partials 217 219 +2 ``` | [Files Changed](https://app.codecov.io/gh/Bluetooth-Devices/dbus-fast/pull/238?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Bluetooth-Devices) | Coverage Δ | | |---|---|---| | [src/dbus\_fast/\_\_version\_\_.py](https://app.codecov.io/gh/Bluetooth-Devices/dbus-fast/pull/238?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Bluetooth-Devices#diff-c3JjL2RidXNfZmFzdC9fX3ZlcnNpb25fXy5weQ==) | `0.00% <0.00%> (ø)` | | | [src/dbus\_fast/\_private/unmarshaller.py](https://app.codecov.io/gh/Bluetooth-Devices/dbus-fast/pull/238?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Bluetooth-Devices#diff-c3JjL2RidXNfZmFzdC9fcHJpdmF0ZS91bm1hcnNoYWxsZXIucHk=) | `95.69% <100.00%> (-0.03%)` | :arrow_down: | ... and [1 file with indirect coverage changes](https://app.codecov.io/gh/Bluetooth-Devices/dbus-fast/pull/238/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Bluetooth-Devices)

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[bdraco]

tested on production 👍