[fix] Dynamic reconfiguration policies

[jjfumero]

Description

This PR fixes the dynamic reconfiguration to select the correct device depending on the input policies.

Problem description

The issue was that the timers were not correctly calculated, and it includes the whole performance evaluation in the case of the performance policy. This PR solves this issue and it refactors the sequential and parallel strategies.

Backend/s tested

This PR has been tested with the OpenCL backend

• [X] OpenCL
• [ ] PTX
• [ ] SPIRV

OS tested

Mark the OS where this PR is tested.

• [X] Linux
• [ ] OSx
• [ ] Windows

Did you check on FPGAs?

If it is applicable, check your changes on FPGAs.

• [ ] Yes
• [X] No

How to test the new patch?

$ make
$ make tests

[jjfumero]

all changes done.