Tezt/Cloud: remove misleading --force-history-mode-switch

This MR simply removes the the --force-history-mode-switch that are added to the node parameters. This is necessary only when restarting the node with a different history mode. It is misleading to put it by default as it could hide unexpected switch.

Several nodes are started with a specific history mode History_mode (Rolling (Some 79)), but this is set at config init, not while updating a config. No need to force switch either.

Manually testing the MR

I guess that running some sandbox senario should be enough dune exec tezt/tests/cloud/main.exe -- DAL --localhost -v --tezt-cloud dal --producers 1

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