Add Oracle Cloud Infrastructure as Cloud Provider

[geekdave]

Fixes #1658

Changes

I'm an engineer at Oracle working on adding support for Oracle Cloud Infrastructure to the OTel Collector Contrib, in the form of a new Resource Detection Processor. See: open-telemetry/opentelemetry-collector-contrib#35091. @dashpole has agreed to act as our project sponsor.

As part of this work, we'd like to define new semantic conventions that we can utilize in that project, to avoid hardcoding names for cloud.provider and cloud.platform. We will add to these conventions over time.

Merge requirement checklist

• CONTRIBUTING.md guidelines followed.
• Change log entry added, according to the guidelines in When to add a changelog entry.
  • If your PR does not need a change log, start the PR title with [chore]
• schema-next.yaml updated with changes to existing conventions. (Not applicable in this case)

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: geekdave / name: Dave Cadwallader (eee5dd8, e9037d8, a154b12)