Group release marklines in charts

[gggritso]

Problem Statement

Many charts in Sentry have an option to show releases. Each release is marked with a blue vertical line. This is very handy, but for projects that cut a lot of releases (e.g., Sentry itself) this creates a lot of blue lines. It's a bit distracting.

Solution Brainstorm

Via @wmak, suggestion is to _group the lines, kind of like map pin clustering. Collapse lines into groups, where hovering over a group shows all releases in that group or bucket. Expand them upon zoom, as appropriate.

Product Area

Dashboards

[getsantry[bot]]

Routing to @getsentry/product-owners-dashboards for triage ⏲️