[Packaging] Add mimalloc to Linux builds

[asfimport]

As a result of ARROW-11009/ARROW-11049/etc. it is now possible to switch allocators at runtime.  Previously only one allocator was compiled into the released builds (e.g. the PYPI version of pyarrow only included jemalloc on Linux and mimalloc on Windows).  It might now make sense to compile both mimalloc and jemalloc on Linux builds to allow the user to switch out to the appropriate allocator at runtime if they need to.

Reporter: Weston Pace / @westonpace
Assignee: Kouhei Sutou / @kou

Related issues:

• [Packaging][Python] Use vcpkg as dependency source for manylinux and windows wheels (relates to)

PRs and other links:

• GitHub Pull Request #9191
• GitHub Pull Request #9197

_{Note: This issue was originally created as ARROW-11231. Please see the migration documentation for further details.}

[asfimport]

Antoine Pitrou / @pitrou:
cc @kou and @xhochy

[asfimport]

Uwe Korn / @xhochy:
The conda packages already come with both.

[asfimport]

Antoine Pitrou / @pitrou:
Oops, ARROW-11212 is only about Python wheels. Other kinds of binary packages should be updated too.

[asfimport]

Kouhei Sutou / @kou:
I'll use this issue for deb/RPM because it seems that other packages have their own issues.

[asfimport]

Kouhei Sutou / @kou:
Issue resolved by pull request 9197
#9197