ci: Use medium workers to avoid out-of-disk issues

[maflcko]

Should fix https://github.com/bitcoin-core/qa-assets/runs/16381636315:

Error: committing container for step {Env:[FILE_ENV=./ci/test/00_setup_env_native_fuzz_with_msan.sh PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin] Command:run Args:[bash -c cd /ci_container_base/ && set -o errexit && source ./ci/test/00_setup_env.sh && ./ci/test/01_base_install.sh] Flags:[] Attrs:map[json:true] Message:RUN bash -c cd /ci_container_base/ && set -o errexit && source ./ci/test/00_setup_env.sh && ./ci/test/01_base_install.sh Original:RUN ["bash", "-c", "cd /ci_container_base/ && set -o errexit && source ./ci/test/00_setup_env.sh && ./ci/test/01_base_install.sh"]}: copying layers and metadata for container "3f2d5964d475f12a28b9cd6f98a97df085ef6224d602cc4140d74ae084908b50": writing blob: adding layer with blob "sha256:e1dc120e1e99bbaa7de0710576a5998e3d9dafa21d6c912ed67328d4dc443b1e": processing tar file(write /msan/clang_build/lib/libclangParse.a: no space left on device): exit status 1

[maflcko]

Not sure what is up with the lint task. It is stalled. Last week it worked: https://cirrus-ci.com/task/5130485496545280
Also, it is not using credits.

[maflcko]

Same for valgrind:

Run coincontrol with args ['valgrind', '--quiet', '--error-exitcode=1', '/ci_container_base/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/test/fuzz/fuzz', '-runs=1', PosixPath('/ci_container_base/ci/scratch/qa-assets/fuzz_seed_corpus/coincontrol')]Error: Disk space is too low!
fuzz: test/util/setup_common.cpp:224: void ChainTestingSetup::LoadVerifyActivateChainstate(): Assertion `status == node::ChainstateLoadStatus::SUCCESS' failed.

Error: Disk space is too low!
fuzz: test/util/setup_common.cpp:224: void ChainTestingSetup::LoadVerifyActivateChainstate(): Assertion `status == node::ChainstateLoadStatus::SUCCESS' failed.

Target ['valgrind', '--quiet', '--error-exitcode=1', '/ci_container_base/ci/scratch/build/bitcoin-x86_64-pc-linux-gnu/src/test/fuzz/fuzz', '-runs=1', PosixPath('/ci_container_base/ci/scratch/qa-assets/fuzz_seed_corpus/coincontrol')] failed with exit code -6
��

[maflcko]

CI is green now, except for lint, which I guess is waiting for an upstream response/fix from Cirrus CI?

[dergoegge]

lgtm

[maflcko]

Force pushed to remove the linter commits. Still not sure how to fix it, so I'll postpone it for later.

[maflcko]

Funny, the lint issue was also due to running out of storage space. Fixed as well, now.