[clang] [flang] [llvm] CodeGen: Remove TargetOptions::FloatABIType (PR #215796)

[Rainer Orth via cfe-commits]

rorth wrote:

This patch broke the [Solaris/sparcv9 buildbot](https://lab.llvm.org/buildbot/#/builders/13/builds/14601).

https://github.com/llvm/llvm-project/pull/215796