[v24.2.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#60101

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

/ci-repeat 1
tests/rptest/tests/scaling_up_test.py::ScalingUpTest.test_fast_node_addition

[vbotbuildovich]

CI test results

test results on build#60101

test_id	test_kind	job_url	test_status	passed
rptest.tests.scaling_up_test.ScalingUpTest.test_fast_node_addition	ducktape	https://buildkite.com/redpanda/redpanda/builds/60101#0193f647-3895-46a6-9a57-6d6f3d7668da	FAIL	0/1

test results on build#60235

test_id	test_kind	job_url	test_status	passed
partition_balancer_simulator_test_rpunit.partition_balancer_simulator_test_rpunit	unit	https://buildkite.com/redpanda/redpanda/builds/60235#0194285d-f549-4ca7-9b77-c4f056a9adcc	FLAKY	1/2
rptest.tests.random_node_operations_test.RandomNodeOperationsTest.test_node_operations.enable_failures=False.mixed_versions=True.with_tiered_storage=True	ducktape	https://buildkite.com/redpanda/redpanda/builds/60235#019428a5-ecb1-4d43-a084-f7a58b6e5d56	FAIL	0/1

[r-vasquez]

/ci-repeat 1
tests/rptest/tests/scaling_up_test.py::ScalingUpTest.test_fast_node_addition

[r-vasquez]

/ci-repeat 1
tests/rptest/tests/scaling_up_test.py::ScalingUpTest.test_fast_node_addition

[r-vasquez]

/ci-repeat 1

[vbotbuildovich]

Retry command for Build#60235

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

/ci-repeat 1
tests/rptest/tests/random_node_operations_test.py::RandomNodeOperationsTest.test_node_operations@{"enable_failures":false,"mixed_versions":true,"with_tiered_storage":true}

[sago2k8]

LGTM