test: run feature_pruning.py without wallet compiled

Summary:
Only one small part of the pruning test (sub-test wallet_test) is
wallet-related, hence we can run all other parts without wallet compiled.

This is a backport of core#23963

Test Plan:
With and without the wallet compiled
ninja check-functional-extended

Reviewers: #bitcoin_abc, roqqit

Reviewed By: #bitcoin_abc, roqqit

Differential Revision: https://reviews.bitcoinabc.org/D17920