openPMD-api: raise minimum required version to 0.17

[franzpoeschel]

This should not be immediately merged, users should have some time to upgrade.

PR implements the following new features:

• Use of RecordComponent::SCALAR has been discarded (need to scan for usage in other places / other plugins again though)
• The JSON matcher has been discarded and the equivalent functionality of the openPMD-api is now used
• --openPMD.toml now allows specifying openPMD backend options in TOML format, it is no longer needed to give them as a JSON string within TOML

TODO:

• Scan again for use of RecordComponent::SCALAR
• Write (and test) a documentation example for --openPMD.toml

[PrometheusPi]

@franzpoeschel regarding your first statement:

This should not be immediately merged, users should have some time to upgrade.

What time frame for making this mainline do you envision?
I will set it as draft for now.

[franzpoeschel]

What time frame for making this mainline do you envision?

Discussed with @psychocoderHPC in the last dev meeting: Some time halfway between now and the next PIConGPU release. Probably before/around summer break or so.

I will set it as draft for now.

The CI also runs on draft PRs, right?

[PrometheusPi]

Yes, even in draft mode, the CI still checks the code.

[psychocoderHPC]

please update: https://github.com/ComputationalRadiationPhysics/picongpu/blob/dev/share/ci/install/openPMD.sh too