Added yamllint config file .yamllint, fixed current linting errors, added install and run yamllint targets.

[yuanning6]

What this PR does / why we need it:

1. This PR adds a .yamllint config file which has rules to config yamllint to enhance linting for yaml files. The lint will be helpful to avoid issues like https://github.com/kubernetes-sigs/cluster-api-provider-ibmcloud/commit/7cd7fcc1c0448df9caae393fa63720a874b36c85.

2. Fixed current yamllint errors.

3. Added install and run yamllint targerts in Makefile.

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 https://github.com/kubernetes-sigs/cluster-api-provider-ibmcloud/issues/1497

Special notes for your reviewer:

/area provider/ibmcloud

1. Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

Release note:

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @yuanning6. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[Prajyot-Parab]

/ok-to-test

[yuanning6]

Hi @Prajyot-Parab !

Thank you so much for your time to take a look at my code! Please let me know if any adjustment is needed!

[Prajyot-Parab]

/cc @Karthik-K-N @Amulyam24

[Prajyot-Parab]

/cc @Karthik-K-N @Amulyam24

[k8s-ci-robot]

PR needs rebase.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[mkumatag]

Don't see any activities in this PR, @Amulyam24 will pick this PR and review comments and create a new one