Add ability to append pid to the filename of the log dumping in ApiDump

[zaiste-linganer]

Proposed solution for issue #2406.

Tested on Windows. Still to be tested on other OSes, but sending for the early review.

@charles-lunarg please have a look!

[ci-tester-lunarg]

Author zaiste-linganer not on autobuild list. Waiting for curator authorization before starting CI build.

[ci-tester-lunarg]

Author zaiste-linganer not on autobuild list. Waiting for curator authorization before starting CI build.

[ci-tester-lunarg]

CI VulkanTools build queued with queue ID 454259.

[ci-tester-lunarg]

CI VulkanTools build # 4578 running.

[ci-tester-lunarg]

CI VulkanTools build # 4578 passed.

[zaiste-linganer]

With the build working across all the targets, and testing done on Windows that it actually works as expected, can we get the final review? :)

Thanks in advance!

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