Description of problem:

Approved access request decision part included  reason as N/A. This is not required as user has no option to provide justification reason during approval cycle. Hence it would be good to  avoid the part i.e. "because : N/A" from the dialog to avoid future confusion.

How reproducible:
Always

Steps to Reproduce:

1. Launch OCM UI staging.
2. Create Access request for a ROSA cluster.
3. Go to Cluster details > Access requests tab.
4. Select and open the pending access request and approve it.
5. Reopen approved request and see the decision definition in the dialog.

Actual results:

Decision section shown the  reason as "because :N/A" and it doesn't make any sense as the user approved without any reason provided in UI.

Expected results:

Avoid showing the reason in decision definition string i.e. remove "because :N/A" part from the definition.