Add more system dependency options to CMake

[niklaskorz]

Allows opt-in for sourcing the following dependencies from the system,
instead of using the vendored ones:

• miniz
• lz4
• vulkan-headers
• spirv-tools
• glslang

(some of these already had options that weren't working, as either it expected them to be static libraries or it was expecting to be embedded in another CMakeList that should provide the package, instead of finding the package itself)

This is based on a patch we currently maintain inside nixpkgs, but as it
frequently conflicts with new slang releases, it would be nice to see get
this upstream.

[CLAassistant]

All committers have signed the CLA.

[samestep]

For context, this is a followup on the conversation from NixOS/nixpkgs#424153.

[samestep]

/format

[slangbot]

🌈 Formatted, please merge the changes from this PR

[jkwak-work]

Looks good to me.

@expipiplus1 , can you review since you are more faimilar with CMake setting?

[jkwak-work]

@niklaskorz , After running /format, you need to manually merge the fix.

[jkwak-work]

This change seems to conflict or duplicate to another PR that was merged recently

• CMake: Guard inclusion of VULKAN_HEADERS and SPIRV-Headers #8124

@niklaskorz , can you review the PR and see if this PR is still needed?

[samestep]

@jkwak-work I merged master into this branch just now and I don't see any conflicts. Could you elaborate on what you see as conflicts or duplication?

[jkwak-work]

I made a mistake on my previous comment.
The keywords "Vulkan" and "SPIRV" looked confusingly similar to me.

It looks good to me.