[#23273] yugabyted: Fix yugabyted configure_read_replica commands.

Summary:
* Added checks to `yugabyted configure_read_replica` commands to check if `:<num_of_replicas> is provided in the `--data_placement_constraint` flag.
Jira: DB-12201

Test Plan: ./yb_build.sh --java-test 'org.yb.yugabyted.*'

Reviewers: nikhil

Reviewed By: nikhil

Subscribers: yugabyted-dev, sgarg-yb

Differential Revision: https://phorge.dev.yugabyte.com/D36842

bin/yugabyted

@@ -6864,6 +6864,8 @@ class ControlScript(object):
                 data_constraints = args.data_placement_constraint.split(",")
                 has_errors = False
                 for constraint in data_constraints:
+                    if ':' not in constraint:
+                        has_errors = True
                     cloud_info = constraint.split(":")[0].split(".")
                     if (len(cloud_info) == 3):
                         for value in cloud_info:
@@ -6875,8 +6877,8 @@ class ControlScript(object):
                 if has_errors:
                     Output.print_out(Output.make_red("ERROR") +
                         ": Incorrect value specified for --data_placement_constraint. " +
-                        "Please specify comma sperated value with format " +
-                        "- cloudprovider.region.zone")
+                        "Please specify comma sperated values with the num of replicas with " +
+                        "format - <cloudprovider.region.zone>:<num_of_replicas>")
                 else:
                     self.configs.temp_data[
                         "rr_data_placement_constraint"] = args.data_placement_constraint
@@ -6900,6 +6902,8 @@ class ControlScript(object):
                 data_constraints = args.data_placement_constraint.split(",")
                 has_errors = False
                 for constraint in data_constraints:
+                    if ':' not in constraint:
+                        has_errors = True
                     cloud_info = constraint.split(".")
                     if (len(cloud_info) == 3):
                         for value in cloud_info:
@@ -6911,9 +6915,8 @@ class ControlScript(object):
                 if has_errors:
                     Output.print_out(
                         "Incorrect value specified for --data_placement_constraint. " +
-                        "Please specify comma sperated value with format " +
-                        "- cloudprovider.region.zone".format(
-                            args.data_placement_constraint))
+                        "Please specify comma sperated values with the num of replicas with " +
+                        "format - <cloudprovider.region.zone>:<num_of_replicas>")
                 else:
                     self.configs.temp_data[
                         "rr_data_placement_constraint"] = args.data_placement_constraint