Update Oracle Database Connector documentation to include setting environment variable ORA_NCHAR_LITERAL_REPLACE=TRUE in target Oracle DB server

[novenera]

My customer is using Logic Apps Standard Oracle connector with OPDG and he came across an issue when reading “national characters” (i.e. those outside of the ASCII character set). They have raised a support ticket to investigate the issue and it has been found that setting environment variable ORA_NCHAR_LITERAL_REPLACE=TRUE on the target Oracle DB server solves the issue. This finding was based on several articles found online:

https://www.appservgrid.com/documentation111/docs/rdbms11gr1/appdev.111/b28843/tdddg_globalization.htm#CIHGJBFI

https://oracle-randolf.blogspot.com/2007/05/national-character-set-and-string.html

The customer has requested if this can be included in our documentation as well so that it could help other customers who may run into the same issue in the future. I would suggest to add it under the known limitations section of the Oracle Database Connector.