Merge branch 'ab/various-leak-fixes'

Various leak fixes.

* ab/various-leak-fixes:
  built-ins: use free() not UNLEAK() if trivial, rm dead code
  revert: fix parse_options_concat() leak
  cherry-pick: free "struct replay_opts" members
  rebase: don't leak on "--abort"
  connected.c: free the "struct packed_git"
  sequencer.c: fix "opts->strategy" leak in read_strategy_opts()
  ls-files: fix a --with-tree memory leak
  revision API: call graph_clear() in release_revisions()
  unpack-file: fix ancient leak in create_temp_file()
  built-ins & libs & helpers: add/move destructors, fix leaks
  dir.c: free "ident" and "exclude_per_dir" in "struct untracked_cache"
  read-cache.c: clear and free "sparse_checkout_patterns"
  commit: discard partial cache before (re-)reading it
  {reset,merge}: call discard_index() before returning
  tests: mark tests as passing with SANITIZE=leak

builtin/diff.c

@@ -612,7 +612,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
 	if (1 < rev.diffopt.skip_stat_unmatch)
 		refresh_index_quietly();
 	release_revisions(&rev);
-	UNLEAK(ent);
+	object_array_clear(&ent);
 	UNLEAK(blob);
 	return result;
 }