Baker does not apply operations when forging a new block

Context

This MR allows the baker to only validate operations instead of validate then apply the operations when forging a block. The baker should forge block faster without having to apply each operation.

The baker can still apply the operation if --force-apply is specified.

Fixes #4285 (closed)

Manually testing the MR

Run the CI and the new test that force the application of operation by the baker

dune exec tezt/tests/main.exe -- --file baker_test.ml -v apply;

You can observe that the Baker with delegate tz1YtB3Hn6oghVk96vkpZt6PHrfbyRY1ciL3 that currently runs with this MR on Mumbainet works fine.

Checklist

• Document the interface of any function added or modified (see the coding guidelines)
• Document any change to the user interface, including configuration parameters (see node configuration)
• Provide automatic testing (see the testing guide).
• For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR