feat(DMD-1071): expose bucketSharingAllowed in bucket list/detail API; add to apiary and E2E tests

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: jirkasemmler

apiary.apib

@@ -1102,6 +1102,7 @@ existing bucket from another project (see below).
                 "databaseName": null,
                 "path": "database_name.c-my-new-bucket",
                 "sharing": null,
+                "bucketSharingAllowed": true,
                 "updated": "2024-11-28T13:03:13+0100",
                 "color": null,
                 "isLinkedBucket": false,
@@ -1390,6 +1391,7 @@ Obtains information about a bucket.
                     "name": "Jan Developer",
                     "email": "jan.dev@keboola.com"
                 },
+                "bucketSharingAllowed": true,
                 "updated": "2024-11-28T13:03:13+0100",
                 "isLinkedBucket": false,
                 "backendPath": [
@@ -1442,6 +1444,7 @@ Synchronous call response (async=false)
                 "isMaintenance": false,
                 "backend": "snowflake",
                 "sharing": null,
+                "bucketSharingAllowed": true,
                 "owner": null,
                 "updated": "2024-11-28T13:03:13+0100",
                 "color": "#00FF00",
@@ -3649,6 +3652,7 @@ Obtains information about a table.
                     "isMaintenance": false,
                     "backend": "snowflake",
                     "sharing": null,
+                    "bucketSharingAllowed": true,
                     "metadata": [],
                     "backendPath": [
                         "KBC_PRJ_123",
@@ -3754,6 +3758,7 @@ Synchronous call response (async=false)
                     "isMaintenance": false,
                     "backend": "snowflake",
                     "sharing": null,
+                    "bucketSharingAllowed": true,
                     "metadata": [],
                     "backendPath": [
                         "KBC_PRJ_123",