bundle: turn on --all-progress-implied by default

bundle: turn on --all-progress-implied by default

In 79862b6b77c (bundle-create: progress output control, 2019-11-10),
"bundle create" learned about the --all-progress and
--all-progress-implied options, which were copied from pack-objects.
I think these were a mistake.

In pack-objects, "all-progress-implied" is about switching the behavior
between a regular on-disk "git repack" and the use of pack-objects for
push/fetch (where a fetch does not want progress from the server during
the write stage; the client will print progress as it receives the
data). But there's no such distinction for bundles. Prior to
79862b6b77c, we always printed the write stage. Afterwards, a vanilla:

  git bundle create foo.bundle

omits the write progress, appearing to hang (especially if your
repository is large or your disk is slow). That seems like a regression.

It's possible that the flexibility to disable the write-phase progress
_could_ be useful for bundle. E.g., if you did something like:

  ssh some-host git bundle create foo.bundle |
  git bundle unbundle

But if you are running both in real-time, why are you using bundles in
the first place? You're better off doing a real fetch.

But even if we did want to support that, it should be the exception, and
vanilla "bundle create" should display the full progress. So we'd want
to name the option "--no-write-progress" or something.

The "--all-progress" option itself is even worse. It exists in
pack-objects only for historical reasons. It's a mistake because it
implies "--progress", and we added "--all-progress-implied" to fix that.
There is no reason to propagate that mistake to new commands.

Likewise, the documentation for these options was pulled from
pack-objects. But it doesn't make any sense in this context. It talks
about "--stdout", but that is not even an option that git-bundle
supports.

This patch flips the default for "--all-progress-implied" back to
"true", fixing the regression in 79862b6b77c. This turns that option
into a noop, and means that "--all-progress" is really the same as
"--progress". We _could_ drop them completely, but since they've been
shipped with Git since v2.25.0, it's polite to continue accepting them.

I didn't implement any sort of "--no-write-progress" here. I'm not at
all convinced it's necessary, and the discussion from the original
thread:

  https://lore.kernel.org/git/20191110204126.30553-2-robbat2@gentoo.org/

shows that that the main focus was on getting --progress and --quiet
support, and not any kind of clever "real-time bundle over the network"
feature. But technically this patch is making it impossible to do
something that you _could_ do post-79862b6b77c.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>