GH-48470: [Python] Construct UuidArray from list of UuidScalars

[tadeja]

Rationale for this change

Request #48470

What changes are included in this PR?

An extension scalar is unwrapped to its storage type when building arrays.

Are these changes tested?

Adding tests soon.

Are there any user-facing changes?

Now user can run such an example to get the output below instead of ArrowInvalid message.

import pyarrow as pa
pa.array([pa.scalar(b'1'*16, type=pa.uuid())], type=pa.uuid())

<pyarrow.lib.UuidArray object at 0x128186970>
[
31313131313131313131313131313131
]

• GitHub Issue: [Python] Cannot construct UuidArray from list of UuidScalars #48470

[github-actions]

⚠️ GitHub issue #48470 has been automatically assigned in GitHub to PR creator.