MGMT-17475: Updating CPU and platform dropdowns when OCP custom release is selected

[ammont82]

Related to https://issues.redhat.com/browse/MGMT-17475 and https://issues.redhat.com/browse/MGMT-17474

When custom OCP version selected the platform and cpu dropdowns needs to be updated:

https://github.com/openshift-assisted/assisted-installer-ui/assets/11390125/617b5c44-5e00-4c95-8cee-5e5c0919c88f

[openshift-ci-robot]

@ammont82: This pull request references MGMT-17475 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the bug to target the "4.16.0" version, but no target version was set.

In response to [this](https://github.com/openshift-assisted/assisted-installer-ui/pull/2540): >Related to https://issues.redhat.com/browse/MGMT-17475 and https://issues.redhat.com/browse/MGMT-17474 > >When custom OCP version selected the platform and cpu dropdowns needs to be updated: > >https://github.com/openshift-assisted/assisted-installer-ui/assets/11390125/617b5c44-5e00-4c95-8cee-5e5c0919c88f > > > Instructions for interacting with me using PR comments are available [here](https://prow.ci.openshift.org/command-help?repo=openshift-assisted%2Fassisted-installer-ui). If you have questions or suggestions related to my behavior, please file an issue against the [openshift-eng/jira-lifecycle-plugin](https://github.com/openshift-eng/jira-lifecycle-plugin/issues/new) repository.

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: ammont82, celdrake, jgyselov

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