Enable bmp table dump before all test cases (sonic-net#17963)

What is the motivation for this PR?
Enable bmp table dump before all test cases as pre-condition

How did you do it?
update ansible/config_sonic_basedon_testbed.yml and add one blocl

How did you verify/test it?
validation will cover it.

Author: FengPan-Frank

ansible/config_sonic_basedon_testbed.yml

@@ -742,6 +742,17 @@
             service: name=chrony state=restarted enabled=true
         when: chrony_service.status.LoadState != "not-found"
 
+      - name: Enable bmp relevant config dump
+        block:
+          - name: execute cli "config bmp enable bgp-neighbor-table" to enable bgp-neighbor-table
+            shell: sudo config bmp enable bgp-neighbor-table
+
+          - name: execute cli "config bmp enable bgp-rib-in-table" to enable bgp-rib-in-table
+            shell: sudo config bmp enable bgp-rib-in-table
+
+          - name: execute cli "config bmp enable bgp-rib-out-table" to enable bgp-rib-out-table
+            shell: sudo config bmp enable bgp-rib-out-table
+
       - name: config static route for trex traffic passthrough
         become: true
         command: "{{ item }}"