Re-enable copywrite with hack (#3569)

* Ignore license change commit from blame

This changed almost all the files in the repo

* Re-enable copywrite with hack

Adds a hack that removes existing copyright headers
from files before rerunning copywrite with directory
specific configuration.

internal/proto/controller/api/.copywrite.hcl

@@ -0,0 +1,8 @@
+schema_version = 1
+
+project {
+  license        = "MPL-2.0"
+  copyright_year = 2020
+
+  header_ignore = []
+}