loader: Log VkInstanceCreateInfo for debugging

[BoiledElectricity]

Closes #1819.

vkCreateInstance now logs the application's VkApplicationInfo (app and engine name/version, apiVersion) plus the requested instance layers and extensions at info level, so they show up under VK_LOADER_DEBUG. Useful for debugging instance setup and for matching driver workarounds to a specific app.

Example:

vkCreateInstance: applicationName: "MyApp", applicationVersion: 42, engineName: "MyEngine", engineVersion: 7, apiVersion: 1.2.0
vkCreateInstance: Requested 1 instance layer(s):
   VK_LAYER_KHRONOS_validation
vkCreateInstance: Requested 1 instance extension(s):
   VK_EXT_debug_utils

Added a regression test covering the dump.

[ci-tester-lunarg]

Author BoiledElectricity not on autobuild list. Waiting for curator authorization before starting CI build.

[ci-tester-lunarg]

Author BoiledElectricity not on autobuild list. Waiting for curator authorization before starting CI build.

[ci-tester-lunarg]

Author BoiledElectricity not on autobuild list. Waiting for curator authorization before starting CI build.

[ci-tester-lunarg]

Author BoiledElectricity not on autobuild list. Waiting for curator authorization before starting CI build.

[ci-tester-lunarg]

Author BoiledElectricity not on autobuild list. Waiting for curator authorization before starting CI build.

[ci-tester-lunarg]

Author BoiledElectricity not on autobuild list. Waiting for curator authorization before starting CI build.

[ci-tester-lunarg]

Author BoiledElectricity not on autobuild list. Waiting for curator authorization before starting CI build.

[ci-tester-lunarg]

Author BoiledElectricity not on autobuild list. Waiting for curator authorization before starting CI build.

[ci-tester-lunarg]

CI Vulkan-Loader build queued with queue ID 763462.

[charles-lunarg]

Turns out the tests were segfaulting because the VkApplicationInfo struct was uninitialized. I went ahead and fixed it because that isn't your mistake :) Plus I made a commit with the changes I suggested, so now its good to approve.

[ci-tester-lunarg]

CI Vulkan-Loader build # 3529 running.

[ci-tester-lunarg]

CI Vulkan-Loader build # 3529 passed.