Improvement of errors when updating distributed table

[PavelShilin89]

At the moment when we try to update the table in non RT mode, we get no understandable errors. It would be great if the error would indicate that we are using the wrong table type.

MRE

mysql -v -h0 -P9306 -e "CREATE TABLE index1(f text, s string); CREATE TABLE products(title text, meta json) type='pq'; ALTER TABLE index1 agent='127.0.0.1:9312:remote_index'; ALTER TABLE products local='index1' local='index3';"
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CREATE TABLE index1(f text, s string)
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CREATE TABLE products(title text, meta json) type='pq'
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ALTER TABLE index1 agent='127.0.0.1:9312:remote_index'
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ALTER TABLE products local='index1' local='index3'
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ERROR 1064 (42000) at line 1: Table products doesn't exist

[djklim87]

Done in manticoresoftware/manticoresearch-buddy@1354c47