Implement --smt-retry-limit option

[JKTKops]

Fixes #3162

Scope:

Add a new option, --smt-retry-limit, which controls how many times we will retry an SMT query that returned Unknown. Previously, we would always retry once.

Estimate:

I think it's done already, but it's unclear where tests for this feature should go (or even if there should be any, as retries were previously untested anyway).

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Review checklist

The author performs the actions on the checklist. The reviewer evaluates the work and checks the boxes as they are completed.

• Summary. Write a summary of the changes. Explain what you did to fix the issue, and why you did it. Present the changes in a logical order. Instead of writing a summary in the pull request, you may push a clean Git history.
• Documentation. Write documentation for new functions. Update documentation for functions that changed, or complete documentation where it is missing.
• Tests. Write unit tests for every change. Write the unit tests that were missing before the changes. Include any examples from the reported issue as integration tests.
• Clean up. The changes are already clean. Clean up anything near the changes that you noticed while working. This does not mean only spatially near the changes, but logically near: any code that interacts with the changes!

[JKTKops]

Please see the comment on the issue.

[github-actions]

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test/regression-evm/test-storagevar03.sh	0.000007	-0.001172
test/regression-evm/test-totalSupply.sh	0.000009	-0.000618
test/regression-evm/test-addu48u48.sh	0.000003	-0.006357
test/regression-evm/test-sum-to-n.sh	0.000017	0.005982
test/regression-wasm/test-memory.sh	0.000017	0.000000
test/regression-wasm/test-wrc20.sh	0.000015	0.021618
test/regression-wasm/test-simple-arithmetic.sh	0.000011	0.000000
test/regression-wasm/test-locals.sh	-0.000000	-0.000000
test/regression-wasm/test-loops.sh	0.000053	-0.000000

[ana-pantilie]

👍