Merge branch 'ps/leakfixes-part-3'

Merge branch 'ps/leakfixes-part-3'

More leakfixes.

* ps/leakfixes-part-3: (24 commits)
  commit-reach: fix trivial memory leak when computing reachability
  convert: fix leaking config strings
  entry: fix leaking pathnames during delayed checkout
  object-name: fix leaking commit list items
  t/test-repository: fix leaking repository
  builtin/credential-cache: fix trivial leaks
  builtin/worktree: fix leaking derived branch names
  builtin/shortlog: fix various trivial memory leaks
  builtin/rerere: fix various trivial memory leaks
  builtin/credential-store: fix leaking credential
  builtin/show-branch: fix several memory leaks
  builtin/rev-parse: fix memory leak with `--parseopt`
  builtin/stash: fix various trivial memory leaks
  builtin/remote: fix various trivial memory leaks
  builtin/remote: fix leaking strings in `branch_list`
  builtin/ls-remote: fix leaking `pattern` strings
  builtin/submodule--helper: fix leaking buffer in `is_tip_reachable`
  builtin/submodule--helper: fix leaking clone depth parameter
  builtin/name-rev: fix various trivial memory leaks
  builtin/describe: fix trivial memory leak when describing blob
  ...