openvswitch_db: Make 'key' parameter optional (#42110)

The OVSDB schema consists of typed columns. The 'key' parameter is
required only for columns with type of a 'map'. This patch makes 'key'
an optional parameter to allow setting values for other column types
like int.

Fixes #42108

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

@@ -33,7 +33,7 @@
     that:
       - "result.changed == false"
 
-- name: Change column value
+- name: Change column value in a map
   openvswitch_db:
     table: Bridge
     record: br-test
@@ -46,7 +46,7 @@
     that:
       - "result.changed == true"
 
-- name: Change column value again (idempotent)
+- name: Change column value in a map again (idempotent)
   openvswitch_db:
     table: Bridge
     record: br-test
@@ -59,6 +59,43 @@
     that:
       - "result.changed == false"
 
+- name: Change column value
+  openvswitch_db:
+    table: Bridge
+    record: br-test
+    col: stp_enable
+    value: true
+  register: result
+
+- assert:
+    that:
+      - "result.changed == true"
+
+- name: Change column value again (idempotent)
+  openvswitch_db:
+    table: Bridge
+    record: br-test
+    col: stp_enable
+    value: true
+  register: result
+
+- assert:
+    that:
+      - "result.changed == false"
+
+- name: Try to set value on a map type without a key (negative)
+  ignore_errors: true
+  openvswitch_db:
+    table: Bridge
+    record: br-test
+    col: other_config
+    value: true
+  register: result
+
+- assert:
+    that:
+      - "result.failed == true"
+
 - name: Remove bridge
   openvswitch_db:
     table: Bridge