scylla-gdb: Enhance 'scylla ptr' to show if object is managed by LSA
scylla-gdb: Enhance 'scylla ptr' to show if object is managed by LSA

Example:

  (gdb) scylla ptr 0x601000480000
  thread 1, large, LSA-managed

One can then use 'scylla lsa-segment 0x601000480000' to examine LSA
segment contents.

scylladb/scylla,duarten/scylla,avikivity/scylla,scylladb/scylla,raphaelsc/scylla,scylladb/scylla,scylladb/scylla,duarten/scylla,raphaelsc/scylla,avikivity/scylla,duarten/scylla,raphaelsc/scylla,avikivity/scylla