build: fix compiling against openssl with no-psk

Node 15 prior to this commit will not compile if openssl is built with
no-psk. Compiling emits an error like this:

```
crypto_tls.cc:(.text+0x4c27): undefined reference to
`node::crypto::TLSWrap::SetCACerts(node::crypto::SecureContext*)'
```

Blame on crypto_tls.cc shows the file was created in a refactor. Before
that refactor SetCACerts was defined outside OPENSSL_NO_PSK ifndef.

PR-URL: #36881
Fixes: #36464
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>

src/crypto/crypto_tls.cc

@@ -1339,8 +1339,6 @@ int TLSWrap::SelectSNIContextCallback(SSL* s, int* ad, void* arg) {
   return SSL_TLSEXT_ERR_OK;
 }
 
-#ifndef OPENSSL_NO_PSK
-
 int TLSWrap::SetCACerts(SecureContext* sc) {
   int err = SSL_set1_verify_cert_store(
       ssl_.get(), SSL_CTX_get_cert_store(sc->ctx_.get()));
@@ -1355,6 +1353,8 @@ int TLSWrap::SetCACerts(SecureContext* sc) {
   return 1;
 }
 
+#ifndef OPENSSL_NO_PSK
+
 void TLSWrap::SetPskIdentityHint(const FunctionCallbackInfo<Value>& args) {
   TLSWrap* p;
   ASSIGN_OR_RETURN_UNWRAP(&p, args.Holder());