feat: update links to use dev.openveda.cloud

[botanical]

Description

• This PR updates all the https://dev.delta-backend.com references to https://dev.openveda.cloud.

[github-actions[bot]]

PR Preview Action v1.4.7 :---: :rocket: Deployed preview to https://NASA-IMPACT.github.io/veda-docs/pr-preview/pr-125/ on branch gh-pages at 2024-02-22 23:50 UTC