update gitignore, remove backup files

3 jobs for 157-driver-handle-socketcan-mode-switches in 3 minutes and 50 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #6101
triggered
build_driver

00:00:13

passed #6100
triggered
build_ip_and_tests

00:00:59

 
  Test
passed #6102
triggered
test_ip_fast

00:02:50

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