chore!: remove JFrog integration (#17353)

- Removes displaying XRay scan results in the dashboard. I'm not sure
  anyone was even using this integration so it's just debt for us to
  maintain. We can open up a separate issue to get rid of the db tables
  once we know for sure that we haven't broken anyone.

coderd/database/queries/jfrog.sql

@@ -1,26 +0,0 @@
--- name: GetJFrogXrayScanByWorkspaceAndAgentID :one
-SELECT
-	*
-FROM
-	jfrog_xray_scans
-WHERE
-	agent_id = $1
-AND
-	workspace_id = $2
-LIMIT
-	1;
-
--- name: UpsertJFrogXrayScanByWorkspaceAndAgentID :exec
-INSERT INTO 
-	jfrog_xray_scans (
-		agent_id,
-		workspace_id,
-		critical,
-		high,
-		medium,
-		results_url
-	)
-VALUES 
-	($1, $2, $3, $4, $5, $6)
-ON CONFLICT (agent_id, workspace_id)
-DO UPDATE SET critical = $3, high = $4, medium = $5, results_url = $6;