In case of JOIN query may contains conditions for other tables, while
optimize_skip_unused_shards was pretty dumb and failed to skip such
columns.
Fix this by removing JOIN before applying this optimization.
v2: restriction for analyzer
v3: ignore 01940_custom_tld_sharding_key under analyzer
Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
Co-Authored-By: Alexey Milovidov <milovidov@clickhouse.com>
