This commit adds the `include_lfs_blobs_in_archive` feature flag. When
switched on, `include_lfs_blobs_in_archive` will enable the inclusion of
LFS blobs in archive files by enabling a flag in the `GetArchiveRequest`
RPC message.

Workhorse will decode the `GetArchiveRequest` and send it to Gitaly,
which will run a custom LFS smudge filter (added in
https://gitlab.com/gitlab-org/gitaly/-/merge_requests/2577, activated
via https://gitlab.com/gitlab-org/gitaly/-/merge_requests/2621). Support
for this flag has already been merged via
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/44159.

To prevent stale archive files from being served from the cache, we
introduce a new version prefix in the archive path. When the feature
flag is enabled, the archive path will be in the format that looks like:

```
/path/to/project-1/:sha/@v2/archive.zip
```

When the feature flag is disabled, the archive path will revert back to
the original form:

```
/path/to/project-1/:sha/archive.zip
```

Relates to https://gitlab.com/gitlab-org/gitlab/-/issues/15079.