[roll] Roll fuchsia [pb] Concurrent downloading for all the artifacts

With local testing from my cloudtop, the downloading of whole PB is
reduced from 4min to ~15seconds

```
$ time ffx product download gs://fuchsia-public-artifacts-release/builds/8777219162463666449/transfer.json ~/local_pb --force
Progress for "Transfer download"
  complete
    2 of 2 steps (100.00%)

real	0m12.231s
user	0m6.689s
sys	0m4.001s
```

Original-Bug: b/288185927
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/878454
Original-Revision: 432b61ae0ef6f42d22ea291ab614de4985460993
GitOrigin-RevId: 153fe0d06f25f8d5576ffa93a1794e09fb28064f
Change-Id: Ib061a2c30b3518b8e22f7c7803cd949f23f957f1
1 file changed
tree: 9c24001f0dc6ba695f6c2069f018a54c282ab672
  1. git-hooks/
  2. infra/
  3. third_party/
  4. cts
  5. firmware
  6. flower
  7. jiri.lock
  8. MILESTONE
  9. minimal
  10. prebuilts
  11. README.md
  12. stem
  13. test_durations
  14. toolchain
README.md

Integration

This repository contains Fuchsia's Global Integration manifest files.

Making changes

All changes should be made to the internal version of this repository. Our infrastructure automatically updates this version when the internal one changes.

Currently all changes must be made by a Google employee. Non-Google employees wishing to make a change can ask for assistance via the IRC channel #fuchsia on Freenode.

Obtaining the source

First install Jiri.

Next run:

$ jiri init
$ jiri import minimal https://fuchsia.googlesource.com/integration
$ jiri update

Third party

Third party projects should have their own subdirectory in ./third_party.