[fix](csv reader) fix csv parser incorrect if enclosing line_delimiter (#38347) #38445
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pick #38347
Csv reader parse data incorrect when data enclosing line_delimiter, for example, line_delimiter is \n and enclose is ', data as follows:
it will be parsed as two columns:
'aaaaaaaaaaaa
andbbbb',
rather than one columnThe reason why this happened is csv reader will not reset result when not match enclose in this
output_buf_read
, causing incorrect truncation was made.