debugger: Add telemetry for new session experience (#31171)

This includes the following data:
- Where we spawned the session from (gutter, scenario list, custom form
filled by the user)
- Which debug adapter was used
- Which dock the debugger is in

Closes #ISSUE

Release Notes:

- debugger: Added telemetry for new session experience that includes
data about:
    - How a session was spawned (gutter, scenario list or custom form)
    - Which debug adapter was used
    - Which dock the debugger is in

---------

Co-authored-by: Joseph T. Lyons <JosephTLyons@gmail.com>

Cargo.lock

@@ -4030,6 +4030,7 @@ dependencies = [
  "smallvec",
  "smol",
  "task",
+ "telemetry",
  "util",
  "workspace-hack",
 ]
@@ -4678,6 +4679,7 @@ dependencies = [
  "command_palette_hooks",
  "convert_case 0.8.0",
  "ctor",
+ "dap",
  "db",
  "emojis",
  "env_logger 0.11.8",