Request: Support prebuilt binaries for Major Linux distributions

Hello.

I'm considering to use this library on our media server implementation.

In my case, I'm using RHEL(Redhat Enterprise Linux)7 compliant distribution (CentOS 7)

In the case of the Linux operating environment, if EOL remains, there is a high tendency not to change the operating environment.

Currently, libultrahdr requires (or recommends)
* Clang 15
* CMake 3.5
* gtest requires CMake 3.13

For RHEL7, It seems Redhat provides [Clang 15 for their service subscribers](https://access.redhat.com/documentation/en-us/red_hat_developer_tools/1/html/using_llvm_15.0.7_toolset/assembly_llvm#ref_compatibility_assembly_llvm).
But for CentOS7, it provides [Clang 7 by SCL](https://www.softwarecollections.org/en/scls/?search=llvm)
Also CentOS7 provides CMake 3.6.1 by SCL

So libultrahdr is hard to use with CentOS7 by toolchain requirements even if they are supported by upstream(RHEL7).

Providing prebuilt binaries for popular Linux distributions would make it easier to adapt this library and help spread the `Ultra HDR` format.