Fix behavior low cardinality setting in creating materialized view (Fix #6293)

[stavrolia]

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For changelog. Remove if this is non-significant change.
Fix #6293
Category (leave one):

• Bug Fix. Small one.

Short description (up to few sentences):
Materialized view now could be created with any low cardinality types regardless to the setting about suspicious low cardinality types.

[den-crane]

The main issue is not the "allow_suspicious_low_cardinality_types" but LowCardinality itself.

desc (select x='a' bool from (select toLowCardinality('a') x))
┌─name─┬─type──────────────────┬
│ bool │ LowCardinality(UInt8) │
└──────┴───────────────────────┴

EXPECTED:

┌─name─┬─type──┬
│ bool │ UInt8 │
└──────┴───────┴

[stavrolia]

@den-crane, the idea of improvement of implicit casts of LowCardinality is good, but unfortunately it is very expensive because of current architecture. So, I think this change is enough for scope of this issue. Could you please create another one?

[den-crane]

OK.
Done #6432