feat: Introduce Cloud AutoML V1 client

[sirtorry]

No description provided.

[dwsupplee]

This is awesome, thanks @sirtorry :). A few high level notes after glancing through:

• It looks like we need to make sure the php_namespace option is updated in the various AutoML proto files (for example: https://github.com/googleapis/googleapis/blob/master/google/cloud/automl/v1/service.proto#L35). It should be AutoMl not AutoML. I can help with this if need be, just let me know.
• We should also update the main README (https://github.com/sirtorry/google-cloud-php/blob/automl-v1/README.md#cloud-automl-beta)
• I thought a smoke test would be autogenerated, but it looks like it wasn't. Would we be able to add one? It should look just like this.

[sirtorry]

For the smoke test, I copied from v1beta1.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@0fb3d2f). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
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  Coverage          ?   92.55%           
  Complexity        ?     4503           
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  Files             ?      312           
  Lines             ?    13497           
  Branches          ?        0           
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  Hits              ?    12492           
  Misses            ?     1005           
  Partials          ?        0

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