Draft: Move issues workflow

What does this MR do and why?

This MR will remove the Issues workflow page from the development contributing guidelines:

• This page is not just for contributors but also pertains to team members
• It is not a helpful guide to making issues and mostly just series of links back to the handbook
• Some of the content may also be outdated.

Sections of the Issues workflow page will be moved into the handbook as appropriate and directly into the issue templates if it makes sense. Everything else can be removed.

Related Issues

Related to:

• technical-writing#744 (closed)
• https://gitlab.com/gitlab-org/quality/contributor-success/team-task/-/issues/162

Issues Workflow Page Outline

SECTION	NEW LOCATION
Issue workflow summary	This MR moves to issue template
Issue Triaging	already in handbook https://about.gitlab.com/handbook/engineering/quality/issue-triage/
Labels	Update: moved to its own Labels page on docs.gitlab.com
Feature Proposals	This MR moves to issue template
Issue Weight	is this used? put in issue template?
Regression Issues	Already exists in handbook: https://about.gitlab.com/handbook/engineering/quality/triage-operations/onboarding/#onboarding-checklist
Technical and UX debt	Update: moved to new Labels page on docs.gitlab.com
Technical debt in follow-up issues	?

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.