fix(connection): get bucket_region in aws_ssm (#1908) (#2043)

[PR #1908/5224601b backport][stable-7] fix(connection): get bucket_region in aws_ssm

This is a backport of PR #1908 as merged into main (5224601).
SUMMARY
when bucket is in us-east-1,
bucket_location["LocationConstraint"] is null
ISSUE TYPE

Bugfix Pull Request

COMPONENT NAME
connection
ADDITIONAL INFORMATION
add condition for bucket_region

Reviewed-by: Mark Chappell

changelogs/fragments/1908-fix_find_out_bucket_region_logic.yml

@@ -0,0 +1,2 @@
+minor_changes:
+  - ssm(connection) - fix bucket region logic when region is ``us-east-1`` (https://github.com/ansible-collections/community.aws/pull/1908)

plugins/connection/aws_ssm.py

@@ -430,7 +430,10 @@ def _get_bucket_endpoint(self):
         bucket_location = tmp_s3_client.get_bucket_location(
             Bucket=(self.get_option("bucket_name")),
         )
-        bucket_region = bucket_location["LocationConstraint"]
+        if bucket_location["LocationConstraint"]:
+            bucket_region = bucket_location["LocationConstraint"]
+        else:
+            bucket_region = "us-east-1"
 
         if self.get_option("bucket_endpoint_url"):
             return self.get_option("bucket_endpoint_url"), bucket_region