Fix JSONExtract function for LowCardinality(Nullable) columns

[vdimir]

Changelog category (leave one):

• Bug Fix (user-visible misbehavior in an official stable release)

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):

• Fix possible crash in JSONExtract function extracting LowCardinality(Nullable(T)) type

[robot-ch-test-poll]

This is an automated comment for commit 2970812 with description of existing statuses. It's updated for the latest CI running

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[vdimir]

Stateless tests (release, s3 storage) [1/2] — fail: 1, passed: 2965, skipped: 31 Details

#58337