[MATLAB] Rename the MEX gateway function

[asfimport]

Currently the main MEX function is named {}mexfcn{}. mexfcn delegates to C++ functions that implement the functionality of the MATLAB Interface to Arrow. 

When the interface is installed, the name, {}mexfcn{}, is on the global MATLAB Search Path and may cause conflicts with functionality outside of the MATLAB Interface to Arrow. 

This issue proposes the following changes:

• Rename the MEX function to call.
• Install the MEX function to the MATLAB package folder hierarchy: +arrow/+cpp.
• Install all dependencies of the MEX function to the same package folder hierarchy.

Reporter: Fiona La / @lafiona
Assignee: Fiona La / @lafiona

PRs and other links:

• GitHub Pull Request #12424

_{Note: This issue was originally created as ARROW-15650. Please see the migration documentation for further details.}

[asfimport]

Kouhei Sutou / @kou:
Issue resolved by pull request 12424
#12424