Get sonatype URL from env vars

[FinlayRJW]

Before this PR

Currently we use the old sonatype instance which can result in very slow syncs. We should switch over to the new s01 instance as described in Nexus Publish Plugin.

After this PR

Now the sonatype URL can be set using environment variables, this will allow us to switch over to the s01 sonatype instance with minimal downtime.

Possible downsides?

We now have to maintain an extra two environment variables

[changelog-app]

Generate changelog in changelog/@unreleased

What do the change types mean?

• feature: A new feature of the service.
• improvement: An incremental improvement in the functionality or operation of the service.
• fix: Remedies the incorrect behaviour of a component of the service in a backwards-compatible way.
• break: Has the potential to break consumers of this service's API, inclusive of both Palantir services
  and external consumers of the service's API (e.g. customer-written software or integrations).
• deprecation: Advertises the intention to remove service functionality without any change to the
  operation of the service itself.
• manualTask: Requires the possibility of manual intervention (running a script, eyeballing configuration,
  performing database surgery, ...) at the time of upgrade for it to succeed.
• migration: A fully automatic upgrade migration task with no engineer input required.

Note: only one type should be chosen.

How are new versions calculated?

• ❗The break and manual task changelog types will result in a major release!
• 🐛 The fix changelog type will result in a minor release in most cases, and a patch release version for patch branches. This behaviour is configurable in autorelease.
• ✨ All others will result in a minor version release.

Type

• Feature
• Improvement
• Fix
• Break
• Deprecation
• Manual task
• Migration

Description

Get sonatype URL from env vars

Check the box to generate changelog(s)

• Generate changelog entry

[autorelease3]

Released 1.17.0