Make mandatory tests non conditional (treeverse#1773)

* Make mandatory tests non conditional.

Currently, if a PR introduces a change that doesn't trigger a mandatory tests,
That PR will never be marked as passing, since mandatroy tests did not complete.

Probably better to have tests run even if they don't add any additional coverage,
than have unmergable PRs. This is not a good solution, but it doesn't seem like
GitHub actions supports anything better.

* removed code in comments

Add OpenAPI endpoints (treeverse#1639)

* Add OpenAPI endpoints

Allow splitting "upload" support for (thick) clients:

1. Client requests a physical location and an opaque token to upload a key to a branch on a
   repo.
2. Client uploads object to physical location.
3. Client requests _linking_ the physical location to the key and completes the upload.  If
   the requested token does not match the existing token then a commit occurred, and client
   should retry, possibly with a different physical location.

* Include object metadata when linking object

This is known to the client (from uploading) so no need for the server to have to query it
from the backing store.  We can revisit and make it optional at some later date if we have
to support currently unknown client use-cases.

remove old treeverse-distcp from docs and its extraction manifest (tr…

…eeverse#1543)

don't sign EXPECT header (treeverse#1477)

Change serviceURL to endpointURL (treeverse#1475)

Different dbpool for branch-locker (treeverse#1447)

generate CLI docs automatically from command help text (treeverse#1408)

Update README.md (treeverse#1416)

Default to use rocks (treeverse#1333)

* Default to use rocks

verify on lakefs run that migration is required. cataloger type is not
set, there are repositories on mvcc tables and migration didn't run

* update installation required message

* add upgrade doc url

* Upgrade docs for data migration

* Update upgrade information

* instruct lakefs migrate up

* Update docs/deploying/upgrade.md

Co-authored-by: Oz Katz <oz.katz@treeverse.io>

* update docs

* Print migration message to output and short description to the log

Co-authored-by: Oz Katz <oz.katz@treeverse.io>

Fix empty merge result (treeverse#1270)