perf script: Display PERF_RECORD_CALLCHAIN_DEFERRED

Handle the deferred callchains in the script output.

  $ perf script
  perf     801 [000]    18.031793:          1 cycles:P:
          ffffffff91a14c36 __intel_pmu_enable_all.isra.0+0x56 ([kernel.kallsyms])
          ffffffff91d373e9 perf_ctx_enable+0x39 ([kernel.kallsyms])
          ffffffff91d36af7 event_function+0xd7 ([kernel.kallsyms])
          ffffffff91d34222 remote_function+0x42 ([kernel.kallsyms])
          ffffffff91c1ebe1 generic_exec_single+0x61 ([kernel.kallsyms])
          ffffffff91c1edac smp_call_function_single+0xec ([kernel.kallsyms])
          ffffffff91d37a9d event_function_call+0x10d ([kernel.kallsyms])
          ffffffff91d33557 perf_event_for_each_child+0x37 ([kernel.kallsyms])
          ffffffff91d47324 _perf_ioctl+0x204 ([kernel.kallsyms])
          ffffffff91d47c43 perf_ioctl+0x33 ([kernel.kallsyms])
          ffffffff91e2f216 __x64_sys_ioctl+0x96 ([kernel.kallsyms])
          ffffffff9265f1ae do_syscall_64+0x9e ([kernel.kallsyms])
          ffffffff92800130 entry_SYSCALL_64+0xb0 ([kernel.kallsyms])

  perf     801 [000]    18.031814: DEFERRED CALLCHAIN
              7fb5fc22034b __GI___ioctl+0x3b (/usr/lib/x86_64-linux-gnu/libc.so.6)

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Indu Bhagat <indu.bhagat@oracle.com>
Cc: "Jose E. Marchesi" <jemarch@gnu.org>
Cc: Beau Belgrave <beaub@linux.microsoft.com>
Cc: Jens Remus <jremus@linux.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jens Axboe <axboe@kernel.dk>
Link: https://lore.kernel.org/20250626105041.31e2d403@gandalf.local.home
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>