Add MCAD version variable

[astefanutti]

This PR adds a variable to parameterise the version of the MCAD dependency.

It follows up #116, so the version used to retrieve the MCAD CRDs is not hard-coded anymore.

It'll also be used for #114.

[openshift-ci]

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[astefanutti]

/assign @anishasthana @KPostOffice @sutaakar

[anishasthana]

Should we also update https://github.com/project-codeflare/codeflare-operator/blob/main/CONTRIBUTING.md?plain=1#L34 as part of this?

@sutaakar fyi^^

[sutaakar]

Would it be possible to update also https://github.com/project-codeflare/codeflare-operator/blob/main/config/internal/mcad/deployment.yaml.tmpl#L28 ?

[astefanutti]

Would it be possible to update also https://github.com/project-codeflare/codeflare-operator/blob/main/config/internal/mcad/deployment.yaml.tmpl#L28 ?

I've intentionally omitted it here, as it's the purpose of #114, that'll be similar to #120.

[sutaakar]

Looks good to me

[anishasthana]

/lgtm

[openshift-ci]

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This pull-request has been approved by: anishasthana, sutaakar

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