Update to use gomega gmeasure

[shyamradhakrishnan]

What this PR does / why we need it:

Update to use gomega gmeasure

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #189

[shyamradhakrishnan]

Ran sample conformance tests

  conformance-tests - /home/ubuntu/go/src/github.com/oracle/cluster-api-provider-oci/test/e2e/conformance_test.go:77 @ 02/21/23 13:58:23.266
    conformance-tests
    Name                         | N | Min       | Median    | Mean      | StdDev | Max
    =========================================================================================
    cluster creation [duration]  | 1 | 8m32.76s  | 8m32.76s  | 8m32.76s  | 0s     | 8m32.76s
    -----------------------------------------------------------------------------------------
    conformance suite [duration] | 1 | 2m8.9265s | 2m8.9265s | 2m8.9265s | 0s     | 2m8.9265s

no warning

[SynchronizedAfterSuite] PASSED [0.000 seconds]
[SynchronizedAfterSuite]
/home/ubuntu/go/src/github.com/oracle/cluster-api-provider-oci/test/e2e/e2e_suite_test.go:252
------------------------------
[SynchronizedAfterSuite] PASSED [913.621 seconds]
[SynchronizedAfterSuite]
/home/ubuntu/go/src/github.com/oracle/cluster-api-provider-oci/test/e2e/e2e_suite_test.go:252

  Timeline >>
  STEP: Tearing down the management cluster @ 02/21/23 14:13:35.571
  << Timeline
------------------------------

Ran 1 of 25 Specs in 1001.394 seconds
SUCCESS! -- 1 Passed | 0 Failed | 0 Pending | 24 Skipped


Ginkgo ran 1 suite in 16m46.126608898s