feat: functions download foo --use-api

[johnstonmatt]

What kind of change does this PR introduce?

Feature DEVWF-756

What is the current behavior?

• supabase functions download foo spins up an edge-runtime container to download the eszip bundle and writes it to the filesystem

What is the new behavior?

• supabase functions download foo --use-api calls the mgmt-api to unbundle the eszip on the server, then returns it as a multipart response and writes it to the filesystem

Parity

We expect that whether you choose to --use-api or not you should end up with the same files on disk.

Additional context

Add any other context or screenshots.

[coveralls]

Pull Request Test Coverage Report for Build 19331858962

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 94 of 139 (67.63%) changed or added relevant lines in 2 files are covered.
• 156 unchanged lines in 11 files lost coverage.
• Overall coverage increased (+0.4%) to 55.051%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
cmd/functions.go	0	13	0.0%
internal/functions/download/download.go	94	126	74.6%

Files with Coverage Reduction	New Missed Lines	%
internal/bans/get/get.go	1	0.0%
internal/storage/rm/rm.go	2	80.61%
internal/utils/api.go	2	87.63%
internal/branches/get/get.go	3	0.0%
internal/gen/keys/keys.go	5	12.9%
internal/functions/deploy/bundle.go	8	85.32%
internal/utils/connect.go	15	89.04%
internal/projects/create/create.go	18	43.0%
internal/link/link.go	22	73.8%
internal/bootstrap/bootstrap.go	24	28.85%

Totals
Change from base Build 19220886525:	0.4%
Covered Lines:	6507
Relevant Lines:	11820

---

💛 - Coveralls