RISC-V: Linearize rollup node

What

Linearizes the use of the pvm state in the rollup node for the transition_pvm function.

Part of RV-113

Closes RV-190

Note: Reviews should focus on the correctness of the usage of state in a linear manner, i.e. a reference to the pvm state should be used only once in a mutable function. (read-only functions do not "move" the state)

Why

Having a linear usage of the state will enable optimum usage of move semantics in the RISC-V PVM backend, thus heavily reducing state duplication at runtime.

How

Reorders calls to get_ticks & others that are using the pvm state, so all functions use only the "latest"/"current" version of the state.

Manually testing the MR

make octez-make octez-smart-rollup-node octez-layer1
dune exec tezt/tests/main.exe -- --file sc_rollup.ml
dune exec ./tezt/tests/main.exe -- riscv

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