container: use ss::chunked_vector

[WillemKauf]

See: redpanda-data/seastar#289

Fixes: https://redpandadata.atlassian.net/browse/CORE-16754, https://redpandadata.atlassian.net/browse/CORE-16433, https://redpandadata.atlassian.net/browse/CORE-14682, potentially many more

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
• v26.1.x
• v25.3.x
• v25.2.x

Release Notes

• none

[WillemKauf]

Backporting for redpanda-data/seastar#288

[Copilot]

Pull request overview

This PR switches Redpanda’s container::chunked_vector wrapper to directly use Seastar’s ss::chunked_vector, removes the local async helper header/tests, and updates the Seastar third-party dependency to a revision that provides the needed chunked-vector headers/async helpers.

Changes:

• Replace the in-repo chunked_vector implementation with using ss::chunked_vector and adjust Bazel deps accordingly.
• Remove container/chunked_vector_async.h and its associated test/BUILD target; switch call sites to Seastar’s chunked_vector_async helpers.
• Bump Seastar revision and update the Bazel seastar.BUILD surface to expose chunked-vector related headers and new deps.

Reviewed changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/v/iceberg/datatypes.cc	Adds missing vassert include for code that uses vassert.
src/v/container/tests/chunked_vector_async_test.cc	Removes async helper tests (file deleted).
src/v/container/tests/BUILD	Removes the deleted async btest target and its macro load.
src/v/container/chunked_vector.h	Replaces the custom implementation with an alias to ss::chunked_vector.
src/v/container/chunked_vector_async.h	Removes local async helpers (file deleted).
src/v/container/BUILD	Updates the chunked_vector Bazel target headers and deps for Seastar-based implementation.
src/v/compaction/key_offset_map.cc	Switches to Seastar’s chunked_vector_async helpers.
MODULE.bazel.lock	Updates lockfile digests for the Seastar revision bump.
bazel/thirdparty/seastar.BUILD	Exposes additional Seastar headers and adds new transitive deps required by Seastar.
bazel/repositories.bzl	Updates Seastar archive URL/sha/strip_prefix to the new revision.

[vbotbuildovich]

Retry command for Build#86544

please wait until all jobs are finished before running the slash command

/ci-repeat 1
skip-redpanda-build
skip-units
skip-rebase
tests/rptest/tests/upgrade_test.py::UpgradeBackToBackTest.test_upgrade_with_all_workloads@{"single_upgrade":false}
tests/rptest/tests/random_node_operations_smoke_test.py::RedpandaNodeOperationsSmokeTest.test_node_ops_smoke_test@{"cloud_storage_type":1,"mixed_versions":false}

[vbotbuildovich]

CI test results

test results on build#86544

test_status	test_class	test_method	test_arguments	test_kind	job_url	passed	reason	test_history
FLAKY(PASS)	DataMigrationsApiTest	test_migrated_topic_data_integrity	{"params": {"cancellation": {"dir": "in", "stage": "executing"}, "include_groups": false, "transfer_leadership": false, "use_alias": false}}	integration	https://buildkite.com/redpanda/redpanda/builds/86544#019f1a74-38dc-4f31-90f4-d6fa8049779e	10/11	Test PASSES after retries.No significant increase in flaky rate(baseline=0.0000, p0=1.0000, reject_threshold=0.0100. adj_baseline=0.1000, p1=0.3487, trust_threshold=0.5000)	https://redpanda.metabaseapp.com/dashboard/87-tests?tab=142-dt-individual-test-history&test_class=DataMigrationsApiTest&test_method=test_migrated_topic_data_integrity
FLAKY(FAIL)	RedpandaNodeOperationsSmokeTest	test_node_ops_smoke_test	{"cloud_storage_type": 1, "mixed_versions": false}	integration	https://buildkite.com/redpanda/redpanda/builds/86544#019f1a74-38dd-4a90-9c13-a9e5fbcbcf22	8/11	Test FAILS after retries.Significant increase in flaky rate(baseline=0.0152, p0=0.0096, reject_threshold=0.0100)	https://redpanda.metabaseapp.com/dashboard/87-tests?tab=142-dt-individual-test-history&test_class=RedpandaNodeOperationsSmokeTest&test_method=test_node_ops_smoke_test
FLAKY(FAIL)	UpgradeBackToBackTest	test_upgrade_with_all_workloads	{"single_upgrade": false}	integration	https://buildkite.com/redpanda/redpanda/builds/86544#019f1a77-5b83-4339-a2c5-f2ef9e53a6b7	8/11	Test FAILS after retries.Significant increase in flaky rate(baseline=0.0099, p0=0.0042, reject_threshold=0.0100)	https://redpanda.metabaseapp.com/dashboard/87-tests?tab=142-dt-individual-test-history&test_class=UpgradeBackToBackTest&test_method=test_upgrade_with_all_workloads

test results on build#86596

test_status	test_class	test_method	test_arguments	test_kind	job_url	passed	reason	test_history
FLAKY(PASS)	ShadowLinkingReplicationTests	test_auto_prefix_trimming	{"source_cluster_spec": {"cluster_type": "redpanda"}, "storage_mode": "tiered", "with_failures": false}	integration	https://buildkite.com/redpanda/redpanda/builds/86596#019f1e03-b37e-43c7-bd12-c15fe52d62a2	10/11	Test PASSES after retries.No significant increase in flaky rate(baseline=0.0399, p0=1.0000, reject_threshold=0.0100. adj_baseline=0.1150, p1=0.2946, trust_threshold=0.5000)	https://redpanda.metabaseapp.com/dashboard/87-tests?tab=142-dt-individual-test-history&test_class=ShadowLinkingReplicationTests&test_method=test_auto_prefix_trimming

[StephanDollberg]

Don't you need to do the same for chunked_hashmap (or is that a separate PR)?

[vbotbuildovich]

/backport v26.1.x

[vbotbuildovich]

Failed to create a backport PR to v26.1.x branch. I tried:

git remote add upstream https://github.com/redpanda-data/redpanda.git
git fetch --all
git checkout -b backport-pr-30965-v26.1.x-924 remotes/upstream/v26.1.x
git cherry-pick -x cd2dd6b3aa 28e89cae64 5b07851af8

Workflow run logs.