Client build failure on Linux 6.6 due to i_ctime check

[iamjoemccormick]

Describe the bug

While BeeGFS 7.4.5 supports Linux 5.15 and 6.8, there was a change in an intermediate kernel version (6.6) that breaks client builds related to i_ctime. This was first reported on the user group, and a patch was proposed that does not assume the kernel internals but instead uses a wrapper.

Describe the system
Linux 6.6 and BeeGFS 7.4.5

To Reproduce
Building the 7.4.5 client on a system that uses Linux 6.6 will fail.

Expected behavior

The client should build with kernel 6.6.

Log messages, error outputs
None available.

Additional context
None