Support for Apple M1

[ilevyor]

Issue #, if available:

Description of changes:

Edited pom.xml to build for mac-arm chip and added corresponding build script.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[graebm]

It's weird to have a variable where the value is set to something explicit, then the value is ignored later. You have here cmake.osx_arm64 = "-DCMAKE_OSX_ARCHITECTURES" but then later, if the variable is set at all (regardless of its value) you set cmake.architecture = "-DCMAKE_OSX_ARCHITECTURES=arm64"

Also, there's no way here to build the x86_64 binary from an M1 mac.

Suggestion 1: having an explicit <profile> for both mac-arm64 and mac-x64.

Suggestion 2: use the variable's value somehow, so that it's more flexible

maybe do like this?

<properties>
    ...
    <cmake.osx_arch>-DOSX_ARCH_DUMMY=1</xmake.osx_arch>

...
        <profile>
            <id>mac-arm64</id>
            ...
            <properties>
                <cmake.osx_arch>-DCMAKE_OSX_ARCHITECTURES=arm64</cmake.osx_arch>

...

                            <execution>
                                <id>cmake-configure</id>
                                ...
                                <configuration>
                                    <arguments>
                                        ...
                                        <argument>${cmake.osx_arch}</argument>

[graebm]

approved if we can run the pipeline one more time successfully
and check that our artifacts are working if you install them on M1

[graebm]

the CodeBuild jobs are passing, but something's weird and Github isn't getting the notifications. Merging...