rptest: always run dbx test on aws and mark it as skipped on other clouds

[nvartolomei]

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
• v25.1.x
• v24.3.x
• v24.2.x

Release Notes

• none

[nvartolomei]

@rpdevmp fyi after this you'll also need CLOUD_PROVIDER=aws environment variable to be set when testing locally. Ofc that's only for tests/rptest/tests/datalake/databricks_test.py. Other tests (i.e. cloud ones) are not affected.

[vbotbuildovich]

Retry command for Build#66638

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

/ci-repeat 1
tests/rptest/tests/datalake/databricks_test.py::DatabricksTest.test_e2e_basic@{"cloud_storage_type":1}

[vbotbuildovich]

CI test results

test results on build#66638

test_class	test_method	test_arguments	test_kind	job_url	test_status	passed	reason
ArchivalTest	test_timeboxed_uploads	{"acks": 0, "cloud_storage_type": 1}	ducktape	https://buildkite.com/redpanda/redpanda/builds/66638#019721e2-5bea-4f67-b618-1246f142d9db	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
CloudStorageTimingStressTest	test_cloud_storage_with_partition_moves	{"cleanup_policy": "compact,delete"}	ducktape	https://buildkite.com/redpanda/redpanda/builds/66638#0197220c-cef8-4665-8fbc-45898ec73bae	FLAKY	20/21	upstream reliability is '97.00854700854701'. current run reliability is '95.23809523809523'. drift is 1.77045 and the allowed drift is set to 50. The test should PASS
DatabricksTest	test_e2e_basic	{"cloud_storage_type": 1}	ducktape	https://buildkite.com/redpanda/redpanda/builds/66638#019721e2-5be9-4eb9-b139-cf9d65415638	FAIL	0/21	The test has failed across all retries
DatabricksTest	test_e2e_basic	{"cloud_storage_type": 1}	ducktape	https://buildkite.com/redpanda/redpanda/builds/66638#0197220c-cef9-459b-abca-d70e90d12fc5	FAIL	0/21	The test has failed across all retries
ShadowIndexingWhileBusyTest	test_create_or_delete_topics_while_busy	{"cloud_storage_type": 2, "short_retention": true}	ducktape	https://buildkite.com/redpanda/redpanda/builds/66638#0197220c-cef9-459b-abca-d70e90d12fc5	FLAKY	16/19	upstream reliability is '96.7948717948718'. current run reliability is '84.21052631578947'. drift is 12.58435 and the allowed drift is set to 50. The test should PASS
PartitionReassignmentsTest	test_add_partitions_with_inprogress_reassignments		ducktape	https://buildkite.com/redpanda/redpanda/builds/66638#0197220c-cef9-459b-abca-d70e90d12fc5	FLAKY	19/21	upstream reliability is '88.41309823677582'. current run reliability is '90.47619047619048'. drift is -2.06309 and the allowed drift is set to 50. The test should PASS