Add CI configuration with ROCm 6

[msimberg]

Adds a ROCm 6.0.2 CI configuration based on ubuntu 22.04 to test for issues like #1239.

[msimberg]

cscs-ci run

[msimberg]

cscs-ci run

[msimberg]

cscs-ci run

[msimberg]

I've tested two new pipelines here, one with ROCm 6.0.2 (based on ubuntu 22.04) and another with 6.2.4 (based on ubuntu 24.04). In general I'd prefer the newer one, but the newer one has a build failure at the moment. For a potential 0.7.1 patch release my suggestion would be the following:

• keep the 6.0.2 pipeline in this PR for 0.7.1
• add a fix like Add workaround for ambiguous complex multiplication overloads in HIP in larft.cu #1241 for 0.7.1
• once 0.7.1 is released, revisit issues with the 6.2.4 pipeline

Are there other suggestions?

@albestro the 6.2.4 build fails on pika with https://gitlab.com/cscs-ci/ci-testing/webhook-ci/mirrors/4700071344751697/7514005670787789/-/jobs/8655570178. This may also be an issue from clang 18 itself, completely independent of the ROCm version. However, does the failure look familiar?

[rasolca]

I've tested two new pipelines here, one with ROCm 6.0.2 (based on ubuntu 22.04) and another with 6.2.4 (based on ubuntu 24.04). In general I'd prefer the newer one, but the newer one has a build failure at the moment. For a potential 0.7.1 patch release my suggestion would be the following:

* keep the 6.0.2 pipeline in this PR for 0.7.1

* add a fix like [Add workaround for ambiguous complex multiplication overloads in HIP in `larft.cu` #1241](https://github.com/eth-cscs/DLA-Future/pull/1241) for 0.7.1

* once 0.7.1 is released, revisit issues with the 6.2.4 pipeline

Are there other suggestions?

Looks like a good plan.

[msimberg]

cscs-ci run

[rasolca]

Expected to fail tests. Will be fixed in #1241.