[ARM][AArch64] Move TestInputs to Inputs (#164633)

It's standard in LLVM to have test inputs be in "Inputs". See
https://llvm.org/docs/TestingGuide.html#extra-files.

Fixes internal issue with #86212.

Author: googlewalt

llvm/test/LTO/AArch64/TestInputs/bar.ll renamed to llvm/test/LTO/AArch64/Inputs/bar.ll

@@ -2,7 +2,7 @@
 ;; be mixed.
 ;;
 ; RUN: llvm-as %s -o %t1.bc
-; RUN: llvm-as %p/TestInputs/foo.ll -o %t2.bc
+; RUN: llvm-as %p/Inputs/foo.ll -o %t2.bc
 ; RUN: llvm-lto -exported-symbol main \
 ; RUN:          -exported-symbol foo_on \
 ; RUN:          -filetype=obj \

llvm/test/LTO/AArch64/TestInputs/fiz.ll renamed to llvm/test/LTO/AArch64/Inputs/fiz.ll

@@ -2,10 +2,10 @@
 ;; be mixed.
 ;
 ; RUN: llvm-as %s -o %t1.bc
-; RUN: llvm-as %p/TestInputs/foo.ll -o %t2.bc
-; RUN: llvm-as %p/TestInputs/fiz.ll -o %t3.bc
-; RUN: llvm-as %p/TestInputs/bar.ll -o %t4.bc
-; RUN: llvm-as %p/TestInputs/old.ll -o %t5.bc
+; RUN: llvm-as %p/Inputs/foo.ll -o %t2.bc
+; RUN: llvm-as %p/Inputs/fiz.ll -o %t3.bc
+; RUN: llvm-as %p/Inputs/bar.ll -o %t4.bc
+; RUN: llvm-as %p/Inputs/old.ll -o %t5.bc
 ; RUN: llvm-lto -exported-symbol main \
 ; RUN:          -exported-symbol foo_on \
 ; RUN:          -exported-symbol foo_off \