go.mod: remove grailbio/base, patch updates

base/cloud/url: move into grail.com

Summary:
cloud/url had only Encode and Decode methods for S3 URLs that are not
necessary, at least not now. Therefore, we can move them to the internal
repo for legacy compatibility with persisted objects with encoded keys,
etc. The two functions have been marked deprecated for end users to
consider removing their usage.

This change breaks the circular dependencies between grailbio/base,
grailbio/testutil, and yasushi-saito/zlibng.

Test Plan:
Unit tests.

Tested that S3 is indeed preserving all special characters by using
s3api directly.

Reviewers: ysaito, O15 scrms, marius, ajonnavithula

Reviewed By: ysaito, O15 scrms, ajonnavithula

Subscribers: smahadevan

Differential Revision: https://phabricator.grailbio.com/D37545

fbshipit-source-id: 58b8f83

update dependencies using release tags (#3)