Implement SQLGetStmtAttr and SQLSetStmtAttr

[rscales]

Implement SQLGetStmtAttr and SQLSetStmtAttr

[alinaliBQ]

The statement attributes that end with *_PTR are pointers for array values. So we should test that we are able to set them to valid values

[alinaliBQ]

Example for setting and getting a pointer value:
Pre-requisite: would need validateSetStmtAttr and validateGetStmtAttr helpers that accept pointer values.

dummy_array; // create an array. 
validateSetStmtAttr(this->stmt, <attribute_ptr>, dummy_array);

// Verify the address is the same
validateGetStmtAttr(this->stmt, <attribute_ptr>, dummy_array);

This example uses an array but some statement pointer attributes are for single values as well

[alinaliBQ]

Have few comments, and also need to fix the merge conflict and run the CI checks for C++ and Dev

[alinaliBQ]

Few more comments for code style

[alinaliBQ]

LGTM, just waiting for the CI check results

[alinaliBQ]

The checks have passed. The Conda failure is not related to our code