ci: improve test CI

[DaniPopes]

Motivation

Make CI better

Solution

• generate test matrices programmatically with a script
• build ALL tests once per target, instead of multiple times with features / individual packages. Remove external-integration-tests feature, since we can just filter better instead of having to recompile
• improve test filters and partitions
• remove useless (I think, please correct me if I'm wrong) install-svm-solc job
• run the heavy integration tests with --release. This might be slower

[Evalir]

build ALL tests once per target, instead of multiple times with features / individual packages. Remove external-integration-tests feature, since we can just filter better instead of having to recompile

huge fan

remove useless (I think, please correct me if I'm wrong) install-svm-solc job

Yeah i think it ended up being useless. We ideally wanted it as a cache step but it didn't really help at all due to the ci structure

run the heavy integration tests with --release. This might be slower

Yeah might be slower, but hopefully it should be OK if the runtime is still less than an hour

[Evalir]

amazing