Revert "[LLVM] Only enable -fno-lifetime-dse in LTO mode (#131381)"

This reverts commit 6ac6312.

Unfortunately, we are seeing runtime failures due to this bug in syl-ls in post-commit.
So we have to pass it until #24952 is resolved

https://github.com/intel/llvm/actions/runs/14204467394/job/39799261846?pr=17710
```
Run SYCL_UR_TRACE=1 sycl-ls
Stack dump without symbol names (ensure you have llvm-symbolizer in your
PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
0  libsycl.so.8         0x00007f531e3576e2
1  libsycl.so.8         0x00007f531e354b6e
2  libc.so.6            0x00007f531db84330
3  libur_loader.so.0    0x00007f531ccd0cd6
4  libur_loader.so.0    0x00007f531ce3e71c
5  libur_loader.so.0    0x00007f531cc780c5
6  libur_loader.so.0    0x00007f531cc7a37c
7  libur_loader.so.0    0x00007f531cc6bb5f urLoaderTearDown + 31
8  libsycl.so.8         0x00007f531e206872
9  libsycl.so.8         0x00007f531e209597
10 ld-linux-x86-64.so.2 0x00007f531e55d0f2
11 ld-linux-x86-64.so.2 0x00007f531e561578
12 libc.so.6            0x00007f531db86a76
13 libc.so.6            0x00007f531db86bbe
14 libc.so.6            0x00007f531db691d1
15 libc.so.6            0x00007f531db6928b __libc_start_main + 139
16 sycl-ls              0x000056195f04c9d5
Segmentation fault (core dumped)
```

Author: jsji

llvm/cmake/modules/HandleLLVMOptions.cmake

@@ -692,7 +692,7 @@ if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
   append("-Werror=unguarded-availability-new" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
 endif()
 
-if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND LLVM_ENABLE_LTO)
+if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
   # LLVM data structures like llvm::User and llvm::MDNode rely on
   # the value of object storage persisting beyond the lifetime of the
   # object (#24952).  This is not standard compliant and causes a runtime