Rework Import and connectors docs for Azure launch

[atovpeko]

There are too many tabs on the Import from console page now. I suggest the local/s3 tabs (second set on the page) be reworked into subheaders

[github-actions]

Allow 10 minutes from last push for the staging site to build. If the link doesn't work, try using incognito mode instead. For internal reviewers, check web-documentation repo actions for staging build status. Link to build for this PR: http://docs-dev.timescale.com/docs-504-rework-imports-and-connections-docs

[atovpeko]

Docs to review:

• https://docs-dev.timescale.com/docs-504-rework-imports-and-connections-docs/migrate/504-rework-imports-and-connections-docs/livesync-for-s3/
• https://docs-dev.timescale.com/docs-504-rework-imports-and-connections-docs/migrate/504-rework-imports-and-connections-docs/livesync-for-kafka/
• https://docs-dev.timescale.com/docs-504-rework-imports-and-connections-docs/migrate/504-rework-imports-and-connections-docs/upload-file-using-console/