MGMT-17471: Add maxLength to search input and not allow to select 'No results found' option

[ammont82]

Related to https://issues.redhat.com/browse/MGMT-17471 and https://issues.redhat.com/browse/MGMT-17472

Add maxLength to search input in OCP custom releases modal and not allow to select 'No results found' option:

[openshift-ci-robot]

@ammont82: This pull request references MGMT-17471 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/2541): >Related to https://issues.redhat.com/browse/MGMT-17471 and https://issues.redhat.com/browse/MGMT-17472 > >Add maxLength to search input in OCP custom releases modal and not allow to select 'No results found' option: > > > 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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[openshift-ci[bot]]

New changes are detected. LGTM label has been removed.