Nightly tests coverage is broken

[igor-sirotin]

Problem

03:51:03  2024/06/21 02:50:55 failed to parse profiles: open /home/jenkins/workspace/status-go/tests-nightly/abi-spec/coverage.out.rerun.*: no such file or directory

https://ci.status.im/job/status-go/job/tests-nightly/258/consoleFull

Implementation

This is probably happening because nightly tests are running in parallel.
So code like rm -f ${package_dir}/coverage.out.rerun.* simply deletes the coverage reports of other runs.

We should add the ${iteration} to the wildcard.