Filter out overflowing operations when forging blocks

Context

This MR refactor the baker's operation selection to prevent the baker from validating a manager operation that would always fail as the operation would too costly, in terms of gas, compared to the remaining available gas. This results in a significant performance improvement, as shown below, as the baker doesn't try to validate all overflowing operations which is especially costly when there is a lot of operations to consider.

Here are two reports with and without this patch. The one without the patch is not safe under 7s block time.

Without baker optimisation:

With baker optimisation:

Checklist

• Document the interface of any function added or modified (see the coding guidelines)
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• Provide automatic testing (see the testing guide).
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