[deps] split `Versions.make` into standalone `*.version` file (#45720)
* deps: include `$(LibName).version`
* deps: rm `Versions.make`
* repo: update `julia.spdx.json`
* deps: split `unwind.version`, add new `llvmunwind.version`
* deps: split `llvm.version` into `clang.version` + `llvm-tools.version`
* stdlib: Add new makefile `all_jlls.version` to include all `_jll` names
* deps/LibUnwind_jll: fix version mismatch (`Project.toml` and `checksum`), xref: #42782