feat: update templates to specify control and worker shapes separately

[joekr]

What this PR does / why we need it:
While the users can specify the shapes independently we wanted our
defined templates to support this as well. It should make it easier
for our users to quickly define different shapes independent of each
other.

Which issue(s) this PR fixes:
Fixes #15

[hyder]

We should also decide how we are going to call the instances: instance, machine, node. Let's pick 1 term and use it consistently. Instance is usually an OCI term whereas I think node is a K8s term and machine is a CAPI term.

[hyder]

A few cosmetic changes

[Djelibeybi]

I actually got this wrong in my suggestions: the OCI Style Guide requires periods at the end of all sentences, including those in table cells. In this case, this is usually only the content in the description field. Please do add periods at the end of each sentence.

[shyamradhakrishnan]

please add an output of e2e test and unit test, just for the sake of completeness

[joekr]

Still working on the CCM test, but I think that one is on me. I'm going to rerun after an image update

Summarizing 1 Failure:

[Fail] Workload cluster creation [It] Cloud Provider OCI testing
/Users/jkratzat/projects/cluster-api-provider-oci-joekr/test/e2e/ccm_helpers.go:83

Ran 8 of 16 Specs in 7067.392 seconds
FAIL! -- 7 Passed | 1 Failed | 0 Pending | 8 Skipped

make test
...
?       github.com/oracle/cluster-api-provider-oci      [no test files]
?       github.com/oracle/cluster-api-provider-oci/api/v1beta1  [no test files]
?       github.com/oracle/cluster-api-provider-oci/cloud/config [no test files]
ok      github.com/oracle/cluster-api-provider-oci/cloud/ociutil        0.866s  coverage: 30.3% of statements
ok      github.com/oracle/cluster-api-provider-oci/cloud/scope  76.402s coverage: 84.0% of statements
?       github.com/oracle/cluster-api-provider-oci/cloud/scope/mocks    [no test files]
?       github.com/oracle/cluster-api-provider-oci/cloud/services/compute       [no test files]
?       github.com/oracle/cluster-api-provider-oci/cloud/services/compute/mock_compute  [no test files]
?       github.com/oracle/cluster-api-provider-oci/cloud/services/identity      [no test files]
?       github.com/oracle/cluster-api-provider-oci/cloud/services/identity/mock_identity        [no test files]
?       github.com/oracle/cluster-api-provider-oci/cloud/services/networkloadbalancer   [no test files]
?       github.com/oracle/cluster-api-provider-oci/cloud/services/networkloadbalancer/mock_nlb  [no test files]
?       github.com/oracle/cluster-api-provider-oci/cloud/services/vcn   [no test files]
?       github.com/oracle/cluster-api-provider-oci/cloud/services/vcn/mock_vcn  [no test files]
ok      github.com/oracle/cluster-api-provider-oci/controllers  27.070s coverage: 69.3% of statements

Update

• [SLOW TEST:2001.603 seconds]
Workload cluster creation
/Users/shyaradh/oke/src/github.com/joekr/cluster-api-provider-oci/test/e2e/cluster_test.go:49
  Cloud Provider OCI testing
  /Users/shyaradh/oke/src/github.com/joekr/cluster-api-provider-oci/test/e2e/cluster_test.go:201
------------------------------
SSSSSSSSSSSTEP: Tearing down the management cluster

JUnit report was created: /Users/shyaradh/oke/src/github.com/joekr/cluster-api-provider-oci/_artifacts/junit.e2e_suite.1.xml

Ran 1 of 16 Specs in 2307.319 seconds
SUCCESS! -- 1 Passed | 0 Failed | 0 Pending | 15 Skipped
PASS

[Djelibeybi]

Something that I just noticed: our examples don't cover all the options. It would be good if we can provide an example usage of all available parameters. It doesn't all have to be in a single example but rather all parameters must be used at least once across all the provided examples.

[joekr]

I've created #35 to cover all the examples @Djelibeybi

I've addressed the changes. Not sure why it is still blocking the PR