l10n: po-id for 2.38 (round 2)

Update following components:

  * branch.c
  * builtin/log.c
  * builtin/rebase.c
  * builtin/remote.c
  * builtin/reset.c
  * builtin/rev-list.c
  * builtin/rev-parse.c
  * builtin/revert.c
  * builtin/sparse-checkout.c
  * builtin/submodule--helper.c
  * command-list.h
  * help.c
  * merge.c

Translate following new components:

  * builtin/check-attr.c
  * builtin/check-ignore.c
  * builtin/check-mailmap.c
  * builtin/column.c
  * builtin/credential-cache--daemon.c
  * builtin/credential-cache.c
  * builtin/credential-store.c
  * builtin/diagnose.c
  * builtin/env--helper.c
  * builtin/fsmonitor--daemon.c
  * builtin/interpret-trailers.c
  * builtin/mailinfo.c
  * builtin/mailsplit.c
  * builtin/mktag.c
  * builtin/mktree.c
  * builtin/pack-redundant.c
  * builtin/replace.c
  * builtin/rerere.c
  * builtin/stripspace.c
  * bulk-checkin.c
  * commit.c
  * credential.c
  * fsmonitor-ipc.c
  * fsmonitor-settings.c
  * http-fetch.c
  * http.c

Also remove unused strings.

Signed-off-by: Bagas Sanjaya <[email protected]>