[templates][base] Don't use CDN for font-awesom/bootstrap

We already have everything locally and thus no need for CDN uses.
1 job for fix_cdn_sources in 16 minutes and 39 seconds (queued for 6 seconds)
Status Job ID Name Coverage
  Build
failed #166754
docker-build
build_linux_36

00:16:39

 
Name Stage Failure
failed
build_linux_36 Build
ERROR: test_used_valid_name (beat.web.toolchains.tests.ToolchainsNameCheck)
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Ran 923 tests in 671.909s

FAILED (errors=612, skipped=40)
Destroying test database for alias 'default' ('/dev/shm/beatweb/test.sqlite3')...
ERROR: Job failed: exit status 1