openvswitch_db : Handle column value conversion and idempotency in no_key case (#43869)

* change column value to string. handle idempotency in no key case

* fix unit test failures in baseline

test/integration/targets/openvswitch_db/tests/basic.yaml

@@ -70,7 +70,8 @@
     table: Bridge
     record: br-test
     col: stp_enable
-    value: true
+    value: 'true'
+  become: yes
   register: result
 
 - assert:
@@ -82,7 +83,8 @@
     table: Bridge
     record: br-test
     col: stp_enable
-    value: true
+    value: 'true'
+  become: yes
   register: result
 
 - assert:
@@ -96,6 +98,7 @@
     record: br-test
     col: other_config
     value: true
+  become: yes
   register: result
 
 - assert: