samples: bluetooth: Add Silabs boards to "no blobs" test cases

Add Silabs boards to the newly added test cases which exercise the
CONFIG_BUILD_ONLY_NO_BLOBS configuration option. Also fix the namespace to
be "peripheral" for the peripheral sample app.

Signed-off-by: Johan Hedberg <johan.hedberg@silabs.com>

Author: jhedberg

samples/bluetooth/central/sample.yaml

@@ -9,10 +9,13 @@ tests:
     tags: bluetooth
     integration_platforms:
       - qemu_cortex_m3
-  sample.bluetooth.central.esp32:
+  sample.bluetooth.central.no_blobs:
     extra_args:
       - CONFIG_BUILD_ONLY_NO_BLOBS=y
     platform_allow:
       - esp32_devkitc_wroom/esp32/procpu
       - esp32s3_devkitm/esp32s3/procpu
       - esp32c3_devkitm
+      - sltb010a/efr32bg22c224f512im40
+      - xg24_rb4187c/efr32mg24b220f1536im48
+      - xg27_dk2602a/efr32bg27c140f768im40

samples/bluetooth/peripheral/sample.yaml

@@ -19,10 +19,13 @@ tests:
     extra_args: SHIELD=x_nucleo_idb05a1
     integration_platforms:
       - nucleo_l4r5zi
-  sample.bluetooth.periodic_adv.esp32:
+  sample.bluetooth.peripheral.no_blobs:
     extra_args:
       - CONFIG_BUILD_ONLY_NO_BLOBS=y
     platform_allow:
       - esp32_devkitc_wroom/esp32/procpu
       - esp32s3_devkitm/esp32s3/procpu
       - esp32c3_devkitm
+      - sltb010a/efr32bg22c224f512im40
+      - xg24_rb4187c/efr32mg24b220f1536im48
+      - xg27_dk2602a/efr32bg27c140f768im40