Perforce plugin is hitting the 260-char path limitation in Windows

[juliomaqueda]

Purpose of this PR

The Perforce Plugin fails at performing Version Control operations over paths that go over 260 characters on Windows environments, even if long paths are enabled.

Michel Salvado provided a patch that fixes the issue by updating the project to:

• Windows SDK 10
• Toolset v142
• P4 api r19.1 with open ssl 1.0.2

Besides that, we needed to create a new Bokken image to build the project under the updated system requirements.

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Testing status

Manual Tests:

• [x] Verified that plugins work in the Editor.
• [x] Ran local tests on your machine.

Automated Tests:

• Perforce tests passing in Yamato for Windows, macOS and Linux.

Yamato: https://unity-ci.cds.internal.unity3d.com/project/421/branch/fix%2F1003508_260-char-path-limitation-exeeded-on-windows