Remove use of unnecessary target and rel attributes where possible

In a number of places we set the following on button and link components:
```
target="_blank"
rel="noopener noreferrer"
```

When we are opening a new window or tab with an `onClick` method, these are likely not needed. We should investigate and refactor this wherever possible in the codebase.

Search the codebase for target="_blank" and rel="noopener noreferrer" on button and link components, then inspect the associated onClick handlers. Remove the attributes only where the handler opens a new window or tab without needing them, and verify that all necessary cases retain their existing behavior.

Written by the indexing model from the issue text.