[BUG] ODBC driver requires additional configuration to use AWS_SIGv4 authentication

[Yury-Fridlyand]

Describe the bug

1. ODBC driver accepts credentials from opensearchodbc profile only from ~/.aws/credentials file. The default profile is ignored.
2. ODBC driver ignores credentials set in environment variables. See doc.

Expected behavior
The JDBC driver accepts credentials from the default profile` and from the environment variables as well. I expected ODBC to do the same.

Version: 1.2.0