Add script to upload publicly-viewable C++ unit test coverage data

[nareddyt]

Example test coverage report: https://storage.googleapis.com/esp-v2-coverage/local-run/third_party/tools/coverage/coverage_tests/index.html

Waiting for GoogleCloudPlatform/oss-test-infra#314 to auto-generate reports per PR.

Signed-off-by: Teju Nareddy [email protected]

[nareddyt]

/test ESPv2-presubmit-coverage

[nareddyt]

Blocked by GoogleCloudPlatform/oss-test-infra#318

[nareddyt]

/test ESPv2-presubmit-coverage

[TAOXUY]

Maybe login by referencing env instead of absolute path?
BTW, I looked at our other jobs, which all include the project setting step but no activate-service-account step t so maybe you can try removing no activate-service-account step

[nareddyt]

Sure, let's use env var.

I double checked some other jobs, it seems like they aren't using the correct service account. They are still using the default prow one as far as I can tell. Take a look at the first few lines here: https://oss-prow.knative.dev/view/gcs/oss-prow/pr-logs/pull/GoogleCloudPlatform_esp-v2/56/ESPv2-presubmit/1237771179012395010

Let's keep the activation in this script. I'm make another PR to either make this consistent across all non-kubekins scripts or try to debug why it's not activated by default.

[google-oss-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: nareddyt, qiwzhang, TAOXUY

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