[backport] [v25.3.x] shadowing: stop replicators on topic deletion

[bharathv]

Fixes #28853

dev PR: #28825

Fixes the reconciliation logic to stop the replicators that are no longer needed after topic got deleted.

Additionally

• Improves logging for state mutating requests (bumped to info)
• Sort partitions and topics in the status output for consistent reporting.

Fixes

https://redpandadata.atlassian.net/browse/CORE-14890
https://redpandadata.atlassian.net/browse/CORE-14891
https://redpandadata.atlassian.net/browse/CORE-14892

Backports Required

• none - not a bug fix
• none - this is a backport
• none - issue does not exist in previous branches
• none - papercut/not impactful enough to backport
• v25.3.x
• v25.2.x
• v25.1.x

Release Notes

Bug Fixes

• Avoids runaway replicators after topics got deleted. Additionally improve some observability related to shadow requests.

[vbotbuildovich]

CI test results

test results on build#77441

test_class	test_method	test_arguments	test_kind	job_url	test_status	passed	reason	test_history
NodesDecommissioningTest	test_decommissioning_rebalancing_node	{"shutdown_decommissioned": false}	integration	https://buildkite.com/redpanda/redpanda/builds/77441#019aefd6-e22f-4f57-889b-39a97fc1b436	FLAKY	17/21	upstream reliability is '91.07142857142857'. current run reliability is '80.95238095238095'. drift is 10.11905 and the allowed drift is set to 50. The test should PASS	https://redpanda.metabaseapp.com/dashboard/87-tests?tab=142-dt-individual-test-history&test_class=NodesDecommissioningTest&test_method=test_decommissioning_rebalancing_node
RecoveryModeTest	test_rolling_restart	null	integration	https://buildkite.com/redpanda/redpanda/builds/77441#019aefd6-e225-4260-b9cb-d26b1c7d4baa	FLAKY	20/21	upstream reliability is '100.0'. current run reliability is '95.23809523809523'. drift is 4.7619 and the allowed drift is set to 50. The test should PASS	https://redpanda.metabaseapp.com/dashboard/87-tests?tab=142-dt-individual-test-history&test_class=RecoveryModeTest&test_method=test_rolling_restart