Improvement: Make CAN events more readable

[dalathegreat]

What

This PR makes the various CAN events more understandable

Why

To make troubleshooting systems easier

How

In this PR, we do a few tweaks to the CAN events;

• All CAN events now pass the interface as the variable joining the event (can_config.xxxxx)
• EVENT_CAN_TX_FAILURE now replaced with the more descriptive EVENT_CAN_NATIVE_TX_FAILURE
• EVENT_CAN_RX_FAILURE now replaced with the more descriptive EVENT_CAN_BATTERY_MISSING event
• Same for battery 2, EVENT_CAN2_RX_FAILURE becomes EVENT_CAN_BATTERY2_MISSING
• EVENT_CAN_RX_WARNING now replaced with EVENT_CAN_CORRUPTED_WARNING
• BMW ix/PHEV no longer throw EVENT_CAN_RX_FAILURE when values are stale. Dedicated EVENT_STALE_VALUE message added.
• Removed EVENT_CANFD_RX_FAILURE event. FD interface now uses EVENT_CAN_BATTERY_MISSING
• EVENT_CAN_CHARGER_MISSING event added to make it easier to find out if the charger is missing
• MCP2515 add-on CAN is now able to throw EVENT_CAN_BUFFER_FULL incase sending starts to fail

[dalathegreat]

Merging this since needed ASAP for troubleshooting