Rework synchronization in api based samples

[SaschaWillems]

Description

This PR reworks how CPU/GPU sync works in the samples based on my (low-level) framework. Those sample still to a device wait idle after each frame, killing any chance of GPU/GPU parallelism.

This PR aims to fix that by introducing proper support for multiple frames-in-flight. The changes will mirror what I did for my samples last year: https://www.saschawillems.de/blog/2025/08/15/fundamental-vulkan-samples-rework/

Note: This is a draft, the PR currently mostly exists for me to track progress on this.

Fixes #1380

	Sample	Updated
1	buffer_device_address
2	calibrated_timestamps
3	color_write_enable
4	compute_nbody
5	conditional_rendering
6	conservative_rasterization
7	debug_utils
8	descriptor_buffer_basic
9	descriptor_indexing
10	dynamic_blending
11	dynamic_line_rasterization
12	dynamic_multisample_rasterization
13	dynamic_primitive_clipping
14	dynamic_rendering
15	dynamic_rendering_local_read
16	dynamic_uniform_buffers
17	extended_dynamic_state2
18	fragment_density_map
19	fragment_shader_barycentric
20	fragment_shading_rate
21	fragment_shading_rate_dynamic
22	graphics_pipeline_library
23	gshader_to_mshader
24	hdr
25	host_image_copy	✅
26	hpp_compute_nbody
27	hpp_dynamic_uniform_buffers
28	hpp_hdr
29	hpp_instancing
30	hpp_mesh_shading
31	hpp_oit_depth_peeling
32	hpp_oit_linked_lists
33	hpp_push_descriptors	✅
34	hpp_separate_image_sampler	✅
35	hpp_terrain_tessellation
36	hpp_texture_loading
37	hpp_texture_mipmap_generation
38	hpp_timestamp_queries
39	instancing	✅
40	logic_op_dynamic_state
41	memory_budget
42	mesh_shader_culling
43	mesh_shading
44	mobile_nerf
45	mobile_nerf_rayquery
46	multi_draw_indirect
47	oit_depth_peeling
48	oit_linked_lists
49	open_cl_interop
50	open_cl_interop_arm
51	open_gl_interop
52	patch_control_points
53	portability
54	profiles
55	push_descriptors	✅
56	rasterization_order_attachment_access
57	ray_queries
58	ray_tracing_basic
59	ray_tracing_extended
60	ray_tracing_invocation_reorder
61	ray_tracing_position_fetch
62	ray_tracing_reflection
63	separate_image_sampler	✅
64	shader_debugprintf
65	shader_object
66	sparse_image
67	synchronization_2
68	terrain_tessellation
69	texture_compression_basisu
70	texture_compression_comparison
71	texture_loading
72	texture_mipmap_generation
73	timeline_semaphore
74	timestamp_queries
75	vertex_dynamic_state

General Checklist:

Please ensure the following points are checked:

• My code follows the coding style
• I have reviewed file licenses
• I have commented any added functions (in line with Doxygen)
• I have commented any code that could be hard to understand
• My changes do not add any new compiler warnings
• My changes do not add any new validation layer errors or warnings
• I have used existing framework/helper functions where possible
• My changes do not add any regressions
• I have tested every sample to ensure everything runs correctly
• This PR describes the scope and expected impact of the changes I am making

Note: The Samples CI runs a number of checks including:

• I have updated the header Copyright to reflect the current year (CI build will fail if Copyright is out of date)
• My changes build on Windows, Linux, macOS and Android. Otherwise I have documented any exceptions

If this PR contains framework changes:

• I did a full batch run using the batch command line argument to make sure all samples still work properly

Sample Checklist

If your PR contains a new or modified sample, these further checks must be carried out in addition to the General Checklist:

• I have tested the sample on at least one compliant Vulkan implementation
• If the sample is vendor-specific, I have tagged it appropriately
• I have stated on what implementation the sample has been tested so that others can test on different implementations and platforms
• Any dependent assets have been merged and published in downstream modules
• For new samples, I have added a paragraph with a summary to the appropriate chapter in the readme of the folder that the sample belongs to e.g. api samples readme
• For new samples, I have added a tutorial README.md file to guide users through what they need to know to implement code using this feature. For example, see conditional_rendering
• For new samples, I have added a link to the Antora navigation so that the sample will be listed at the Vulkan documentation site