gno test -covermode

[thehowl]

Depends on #1121

Bounty Requirements

• The gno test command should have a -covermode flag, which allows to set -covermode count. (Note: -covermode atomic is not necessary in Gno, being single-threaded)
• This works by "counting" the number of times the statements are covered, rather than simply detecting whether they are covered at least once.
• The -covermode atomic results should be accessible through the cover profile.
• The CI on examples should be set to use -covermode atomic.

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[moul]

I have a request regarding this issue, or possibly one of the two related issues.

Can we ensure that the system we set up will allow us to compute more information than just counting how many times a line was hit? I believe we also want to monitor metrics such as "gas consumed" per line and per iteration. Additionally, this will be a place where we can track "allocs" if we decide to differentiate between execution gas and storage gas.