Add MRSP for GEV

[flomonster]

Mock-up

AC for osrd-ui

• [x] Red limits are standard speed limits (any speed limit except the temporary ones)
• [x] Yellow ones are temporary speed limits
• [x] The train length before accelerations must be displayed as the mockup specifies
• [x] When the checkbox is ticked, both temporary and normal speed limits are display
• [ ] There must be two new checkboxes in the settings to display the standard and temporary speed limits
• [ ] Those checkboxes can be ticked independentely
• [ ] If only Speed limits is ticked, only the standard speed limits are displayed (in red). There must be a value of speed limit everywhere along the path.
• [ ] If only the Temporary speed restrictions is ticked, only the temporary speed limits are displayed (in yellow). Nothing is displayed if there's no temporary speed limit.
• [ ] If both are ticked, the most restrictive speed limit si displayed with the right color corresponding to the speed limit type

AC for osrd (integration)

• [ ] The MRSP is implemented in operational studies (no temporary speed limits)
• [ ] The MRSP is implemented in stdcm (no temporary speed limits yet, require backend)

[flomonster]

After a discussion with @thibautsailly, we decided to have only one checkbox for both temporary and normal speed limits.