[WIP] PHP SDK integration

[roxblnfk]

What was changed

Added runner preparation:

• configuring SDK version
• downloading PHP vendor packages
• downloading RoadRunner
• do it in a separated directory

Added runner that runs RoadRunner and starts PHP features in a single run.

Implemented features:

• activity 3 / 5
• build_id_versioning 0 / 6 (not supported)
  • [Feature Request] Allow to register checksum with the worker sdk-php#311
• child_workflow 3 / 13
  • Child Workflow doesn't inherit parent's Task Queue sdk-php#451
• client 0 / 2
• continue_as_new 1 / 1
  • ContinueAsNew options dto doesn't inherit Workflow's Task Queue sdk-php#453
• data_converter 7 / 7
  • Add Binary Protobuf Converter into default set sdk-php#455
  • Encode Failures using EncodedAttributes sdk-php#454
• eager_activity 0 / 1 (waiting SDK feature)
  • [Feature Request] Add new options into WorkerOptions sdk-php#456
• eager_workflow 1 / 1
• local_activity 0 / 15 (all cases are empty)
• query 5 / 5
• reset 0 / 1 (not required)
• schedule 4 / 5 (our cron doesn't support seconds. Should it support seconds?)
• search_attributes 0 / 2 (all cases are empty)
• signal 6 / 7
  • Signal from signal-with-start must be processed before Workflow Handler initialization sdk-php#457
• telemetry 0 / 1 (OTEL package is not released yet)
• timer 0 / 0
• tracing 0 / 0
• update 11 / 11
  • [Feature Request] Expose WorkflowStub::getUpdateHandle() method sdk-php#458
  • Updates: retryable exceptions sdk-php#463

Checklist

• Closes [Feature Request] PHP harness #103
• CI
  • Register docker image there https://github.com/temporalio/docker-builds/blob/main/.github/workflows/features-integration.yml
    • Add PHP docker image building #541
    • Publish PHP in the Dockerhub #546
    • Wait for merging this PR

How to run

go build -o temporal-features
./temporal-features run --lang php

Windows:

go build -o temporal-features.exe
./temporal-features.exe run --lang php

[roxblnfk]

Looks like we need to register the temporaliotest/features:php docker image

UPD:
Added TODO about registering the image there https://github.com/temporalio/docker-builds/blob/main/.github/workflows/features-integration.yml

[roxblnfk]

About this option:

• eager_activity 0 / 1 (waiting SDK feature)
  [Feature Request] Add new options into WorkerOptions sdk-php#456

Adding this test requires adjustments to the framework because RR needs to be restarted with special worker settings.
I'm not sure it's worth spending time on it right now.

[roxblnfk]

Ready for review.
You don't need to spend effort reviewing PHP files.
For the most part, they are the same tests that are also run in the PHP-SDK.