[llvm] workflows/release-binaries: Drop install-ninja action (PR #167070)

[Tom Stellard via llvm-commits]

tstellar wrote:

> OK, looks like it's only installed by default on x86 Linux and not ARM Linux.

Well that's what the documentation says according to the testing it's the other way around.

https://github.com/llvm/llvm-project/pull/167070