ci(drone): fix duplicate pipeline names

[PiDelport]

Drone requires unique pipeline names, which PR #10423 (5c45465) missed.

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[PiDelport]

@wing328: The pipelines run correctly and in isolation now, but they still seem to run sequentially: is the concurrency being limited at the Drone Runner level?

[wing328]

is the concurrency being limited at the Drone Runner level?

It could be. No expert in Drone.io CI. Like other open-source projects, we're using their free plan.

[PiDelport]

Coolness, all happy now. Parallelism aside, this change also means the different languages' tests now run fully isolated from each other, which wasn't the case before, so that's probably worth keeping the change for even if the actual concurrency stays limited.