Add Support for GKE clusters

[jujoramos]

Fixes #3

[jujoramos]

@alenkacz : the failure doesn't seem related to my changes, any ideas?:

+ curl -L https://github.com/kudobuilder/kuttl/releases/download/v0.13.0/kubectl-kuttl_0.13.0_darwin_x86_64 --output kuttl
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100 35.9M  100 35.9M    0     0  33.6M      0  0:00:01  0:00:01 --:--:-- 55.1M
+ chmod +x kuttl
+ ./kuttl test --config test/e2e/e2e-test.yaml
./test/run-e2e-tests.sh: line [21](https://github.com/alenkacz/cert-manager-verifier/actions/runs/3837516872/jobs/6535662087#step:7:22): ./kuttl: cannot execute binary file: Exec format error
make: *** [Makefile:11: e2e-test] Error 126
Error: Process completed with exit code 2.

[alenkacz]

seems like it's downloading a binary for mac which is not right for CI, I'll look into that!