Filter `site_status_tests`

Hi,

We have two errors in the "Site Health" section of WP.

```
The public key constant OIDC_PUBLIC_KEY is malformed.
The private key constant OIDC_PRIVATE_KEY is malformed.
```

Because,
```
var_dump(substr( OIDC_PUBLIC_KEY, - strlen( '-----END PUBLIC KEY-----' )));

// return string(24) "----END PUBLIC KEY----- ";
```
My public key ends with "`-----END PUBLIC KEY-----`"

It's the same problem with the private key.
```
var_dump(substr( OIDC_PRIVATE_KEY, - strlen( '-----END RSA PRIVATE KEY-----' )));
// return string(29) "----END RSA PRIVATE KEY----- "
```

Thanks.

Start by locating the site_status_tests filter and the Site Health checks that validate OIDC_PUBLIC_KEY and OIDC_PRIVATE_KEY. Confirm how the reported key formatting produces the malformed-key errors, then determine the expected Site Health behavior; done when valid configured keys no longer produce these errors.

Written by the indexing model from the issue text.