Add an indication of deprecation to product and to docs for deprecated features

[likeshumidity]

Is your feature request related to a problem? Please describe.
Customers are sometimes surprised by our deprecations, and new customers may have no idea that we are deprecating a feature and start building based on it. Some examples:

• Data Reference - we tried to deprecate but got a lot of pushback from users, so we kept it
• Segments & Metrics - planned for deprecation more than a year, does not work very well/not fully implemented, no indication in product or docs of this, frustrating experience for customers
• Pulse reports in Collections - had a customer surprised by this deprecation

(Let me know if you need more examples or links to relevant tickets.)

Describe the solution you'd like

• Add a deprecated label to any create/modify/configure screens in product with hover on label modal showing:
  • Link to a Github issue mentioning the deprecation
  • Link to the help page (same as clicking the Gear then Help)
• Add a deprecated label to top of relevant section in docs with
  • Link to a Github issue mentioning the deprecation
  • Suggestion to ask forums if OSS and contact support if paid customer with any questions/concerns.
  • If applicable, link to Github issue for replacement/improvement functionality (e.g. for Segments & Metrics, link to the Metrics v2 epic)

Describe alternatives you've considered

• no change, customers frustrated
• deprecated label with no CTA (minimum requirement, but dead end, and we lose the feedback)

How important is this feature to you?

• Improves customer experience by better informing them of our roadmap that might affect their usage of some features

Additional context

• [Epic] Metrics v2 #37335
• Deprecate Druid as a DW #33696 (unsure if planned)
• Remove Google Analytics Driver from the codebase #31410
• Metric created by dividing two other Metrics breaks Question #30574