Add ability to run e2e tests on top of nightly release
Add ability to run e2e tests on top of nightly release

Extend release tag annotation check in the TestTaskRunFailure test to cover
also nightly release builds.

Signed-off-by: Yulia Gaponenko <4e1e642fe1866b37c57d72b7676d11bb58a731a1@de.ibm.com>

tektoncd/pipeline,tektoncd/pipeline