Set nexus resource limits

Package Owner Merge Request

Package Changes

Added resource requests and limits to pods with guaranteed QoS.

Links to all MRs that are associated with this change are required.

https://repo1.dso.mil/platform-one/big-bang/apps/developer-tools/nexus/-/merge_requests/15

Additional Details

remove gatekeeper violations for nexus container. Istio related violations are part of separate ticket

Also, include any issues closed with "Closes #ISSUE_NUMBER". See example:

Closes https://repo1.dso.mil/platform-one/big-bang/apps/core/policy/-/issues/94

Add any labels for affected packages so that they are deployed in CI. See example:

Once the MR is ready for review also add the status::review label.