Made `MutableList::try_extend_from_lengths` public

[ritchie46]

Was already public on offsets.

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (b09e580) 83.73% compared to head (72f0ef0) 83.73%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1486 +/- ## ======================================= Coverage 83.73% 83.73% ======================================= Files 389 389 Lines 41811 41811 ======================================= Hits 35009 35009 Misses 6802 6802 ``` | [Impacted Files](https://app.codecov.io/gh/jorgecarleitao/arrow2/pull/1486?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Jorge+Leitao) | Coverage Δ | | |---|---|---| | [src/array/list/mutable.rs](https://app.codecov.io/gh/jorgecarleitao/arrow2/pull/1486?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Jorge+Leitao#diff-c3JjL2FycmF5L2xpc3QvbXV0YWJsZS5ycw==) | `79.89% <100.00%> (ø)` | |

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.