[v24.1.x] rpk: bump dataplane to v1alpha2

[r-vasquez]

The new dependency version soft-deprecates the
v1alpha2 services.

(cherry picked from commit 8d2c633)

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
• v24.3.x
• v24.2.x
• v24.1.x

Release Notes

• none

[vbotbuildovich]

Retry command for Build#60102

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

/ci-repeat 1
tests/rptest/tests/compaction_e2e_test.py::CompactionE2EIdempotencyTest.test_basic_compaction@{"initial_cleanup_policy":"delete","workload":"TX_UNIQUE_KEYS"}

[vbotbuildovich]

CI test results

test results on build#60102

test_id	test_kind	job_url	test_status	passed
rptest.tests.compaction_e2e_test.CompactionE2EIdempotencyTest.test_basic_compaction.initial_cleanup_policy=delete.workload=Workload.TX_UNIQUE_KEYS	ducktape	https://buildkite.com/redpanda/redpanda/builds/60102#0193f660-0486-452f-bab1-9e6187ba6eeb	FAIL	0/1
rptest.tests.delete_records_test.DeleteRecordsTest.test_delete_records_concurrent_truncations.cloud_storage_enabled=True.truncate_point=start_offset	ducktape	https://buildkite.com/redpanda/redpanda/builds/60102#0193f667-b3ab-4a94-8163-52e5ff1b3472	FLAKY	5/6

test results on build#60232

test_id	test_kind	job_url	test_status	passed
rptest.tests.nodes_decommissioning_test.NodesDecommissioningTest.test_learner_gap_metrics	ducktape	https://buildkite.com/redpanda/redpanda/builds/60232#0194283c-cf3a-4c6f-9a3d-18b6afbff1cf	FLAKY	4/6

[r-vasquez]

/ci-repeat 1
tests/rptest/tests/compaction_e2e_test.py::CompactionE2EIdempotencyTest.test_basic_compaction

[r-vasquez]

/ci-repeat 1