feat: add workspace agent connect and app open audit types (#16493)

This commit adds new audit resource types for workspace agents and
workspace apps, as well as connect/disconnect and open/close actions.

The idea is that we will log new audit events for connecting to the
agent via SSH/editor.

Likewise, we will log openings of `coder_app`s.

This change also introduces support for filtering by `request_id`.

Updates #15139

coderd/database/migrations/000293_add_audit_types_for_connect_and_open.down.sql

@@ -0,0 +1 @@
+-- No-op, enum values can't be dropped.

coderd/database/migrations/000293_add_audit_types_for_connect_and_open.up.sql

@@ -0,0 +1,13 @@
+-- Add new audit types for connect and open actions.
+ALTER TYPE audit_action
+	ADD VALUE IF NOT EXISTS 'connect';
+ALTER TYPE audit_action
+	ADD VALUE IF NOT EXISTS 'disconnect';
+ALTER TYPE resource_type
+	ADD VALUE IF NOT EXISTS 'workspace_agent';
+ALTER TYPE audit_action
+	ADD VALUE IF NOT EXISTS 'open';
+ALTER TYPE audit_action
+	ADD VALUE IF NOT EXISTS 'close';
+ALTER TYPE resource_type
+	ADD VALUE IF NOT EXISTS 'workspace_app';