[rp2040_ble][bluetooth_connection] 3 connection slots on rp2 with esp32 parity (#18247)

tests/components/bluetooth_proxy/test.rp2040-ard.yaml

@@ -1,5 +1,7 @@
 # Full proxy on the rp2 BLE hub: active defaults to true here (esp32 parity),
-# so this compiles the BTstack GATT client backend and one connection slot.
+# so this compiles the BTstack GATT client backend with the default three
+# connection slots, exercising the rp2040_ble/btstack_memory.cpp pool --wrap
+# link.
 # No explicit ble_hub_id: the generated binding resolves the single declared
 # hub, and an inline id here would collide with rp2_ble_tracker's own fixture
 # once CI merges both components into one grouped rp2040-ard build (grouped

tests/components/bluetooth_proxy/test.rp2350-ard.yaml

@@ -0,0 +1,9 @@
+# Pico 2 W build of the full proxy: links the rp2350 framework archive, so
+# the pool --wrap overrides and their per-architecture layout asserts are
+# exercised for this chip too (see test.rp2040-ard.yaml for the slot shape).
+packages:
+  common: !include common.yaml
+
+rp2_ble_tracker:
+
+bluetooth_proxy: