Add time and memory related db operation metrics

[dnaik-sfx]

trafficstars

Fixes #723 (split off from #1186)

Changes

Adding additional db operation metrics related to memory and time spent.

Merge requirement checklist

• [x] CONTRIBUTING.md guidelines followed.
• [x] 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.

[joaopgrassi]

CC @open-telemetry/semconv-db-approvers

[github-actions[bot]]

This PR was marked stale due to lack of activity. It will be closed in 7 days.

[github-actions[bot]]

This PR was marked stale due to lack of activity. It will be closed in 7 days.

[github-actions[bot]]

Closed as inactive. Feel free to reopen if this PR is still being worked on.