feat(attributes): Add cache.item_age and cache.tags

[s1gr1d]

Description

Closes getsentry/sentry-javascript#24292

PR Checklist

• I have run yarn test and verified that the tests pass.
• I have run yarn generate to generate and format code and docs.

If an attribute was added:

• The attribute is in a namespace (e.g. nextjs.function_id, not function_id)
• I have used the correct value for apply_scrubbing (i.e. manual or auto. Use never only for values that should never be scrubbed such as IDs)

If an attribute was deprecated:

• I've followed the policies described in CONTRIBUTING.md

[github-actions]

Semver Impact of This PR

🟡 Minor (new features)

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New Features ✨

• (attributes) Add cache.item_age and cache.tags by s1gr1d in #637

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