[C++] Add ReadTable method to RecordBatchFileReader

[asfimport]

For convenience, it would be helpful to add an method for just reading the entire file as a table.

Reporter: Will Jones / @wjones127

_{Note: This issue was originally created as ARROW-17401. Please see the migration documentation for further details.}

[OmkarTipugade]

I want to work on this issue
Please guide me in solving this issue
Sir, I am new to Open Source
Please tell me what thing I have to do first

[samuelpwlim]

Hi team, I'd like to take a shot at this issue if no one is working on it. Thank you

[kou]

This issue is for the C++ implementation: https://github.com/apache/arrow/tree/main/cpp
This issue is not for the MATLAB implementation: https://github.com/apache/arrow/tree/main/matlab