PlatformConfig: automatically get platform_str from the enum name (#31868)

* get platform_str from the enum name

* fix tests

* add migration table

* remove impossible todo

* Add link to PR in MIGRATION table

Co-authored-by: Adeeb Shihadeh <adeebshihadeh@gmail.com>

* Remove useless brand name comments and rename RAM_1500 to RAM_1500_5TH_GEN

* rename RAM_HD to RAM_HD_5TH_GEN

* rename references to RAM_HD and RAM_1500

* change "mock" to "MOCK" and rename torque data of Nissan Leaf 2018 IC

* remove MOCK from fingerprints.py

* change hard-coded car model in test_can_fingerprint.py/test_timing

* migration

* update ref

* space

* prius

---------

Co-authored-by: Adeeb Shihadeh <adeebshihadeh@gmail.com>
Co-authored-by: justin newberry <justin@comma.ai>
Co-authored-by: Justin Newberry <jnewberry0502@gmail.com>
old-commit-hash: 489528dcae3888311f92075ba9e0f68626725121

scripts/launch_corolla.sh

@@ -2,6 +2,6 @@
 
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
 
-export FINGERPRINT="TOYOTA COROLLA TSS2 2019"
+export FINGERPRINT="COROLLA_TSS2"
 export SKIP_FW_QUERY="1"
 $DIR/../launch_openpilot.sh