Merge patch series "pipe: don't update {a,c,m}time for anonymous pipes"

Oleg Nesterov <oleg@redhat.com> says:

Don't update {a,c,m}time for anonymous pipes for performance reasons.

* patches from https://lore.kernel.org/r/20250205181716.GA13817@redhat.com:
  pipe: don't update {a,c,m}time for anonymous pipes
  pipe: introduce struct file_operations pipeanon_fops

Link: https://lore.kernel.org/r/20250205181716.GA13817@redhat.com
Signed-off-by: Christian Brauner <brauner@kernel.org>