chore: exclude autogenerated files from codecov (googleapis#725)

Author: igorbernstein2

java-bigtable/codecov.yaml

@@ -2,3 +2,15 @@
 codecov:
   ci:
     - source.cloud.google.com
+
+# exclude all autogenerated code
+ignore:
+ - google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/*/v2/BaseBigtable*.java
+ - google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/*/v2/stub/GrpcBigtable*Stub.java
+ - google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/*/v2/stub/GrpcBigtable*CallableFactory.java
+ - grpc-google-cloud-bigtable-admin-v2
+ - proto-google-cloud-bigtable-admin-v2
+ - grpc-google-cloud-bigtable-v2
+ - proto-google-cloud-bigtable-v2
+ - .kokoro
+ - .github

java-bigtable/synth.py

@@ -41,6 +41,8 @@ def main():
     # todo remove once template is updated
     '.github/ISSUE_TEMPLATE/bug_report.md',
     'CONTRIBUTING.md',
+    # exclude autogen
+    'codecov.yaml'
   ])
 
 def generate_data_api(gapic):