MGMT-16475: Change reason for platform dropdown to be disabled

[ammont82]

Related to https://issues.redhat.com/browse/MGMT-16475

In case of x86 and SNO - UI shows integration box disabled because of "Platform integration is not supported when x86 is selected" and needs to show "Platform integration is not supported for SNO clusters":

[openshift-ci-robot]

@ammont82: This pull request references MGMT-16475 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/2469): >Related to https://issues.redhat.com/browse/MGMT-16475 > >In case of x86 and SNO - UI shows integration box disabled because of "Platform integration is not supported when x86 is selected" and needs to show "Platform integration is not supported for SNO clusters": > > > 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-robot]

@ammont82: This pull request references MGMT-16475 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/2469): >Related to https://issues.redhat.com/browse/MGMT-16475 > >In case of x86 and SNO - UI shows integration box disabled because of "Platform integration is not supported when x86 is selected" and needs to show "Platform integration is not supported for SNO clusters": > > > 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]]

New changes are detected. LGTM label has been removed.

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: ammont82

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Needs approval from an approver in each of these files: - **[OWNERS](https://github.com/openshift-assisted/assisted-installer-ui/blob/master/OWNERS)** Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: ammont82

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files: - **[OWNERS](https://github.com/openshift-assisted/assisted-installer-ui/blob/master/OWNERS)** Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: ammont82

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files: - **[OWNERS](https://github.com/openshift-assisted/assisted-installer-ui/blob/master/OWNERS)** Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment