[C++][Python] Change Memory Mapping to be off by default

[asfimport]

Having memory mapping on can cause problems on some kind of file systems like NFS etc...

We should make sure that by default memory mapping is off on every read and write.

Reporter: Alessandro Molina / @amol-

Subtasks:

• [C++] Research where Memory Mapping is ON by default in Arrow-C++
• [Python] Research if memory mapping is on by default in PyArrow
• [Python] Disable memory mapping by default in pyarrow
• [C++] Disable memory mapping by default in Arrow-C++

_{Note: This issue was originally created as ARROW-16379. Please see the migration documentation for further details.}

[asfimport]

Apache Arrow JIRA Bot:
This issue was last updated over 90 days ago, which may be an indication it is no longer being actively worked. To better reflect the current state, the issue is being unassigned per project policy. Please feel free to re-take assignment of the issue if it is being actively worked, or if you plan to start that work soon.