Describe the bug
#2981 introduced SslBundle support which BTW a really nice feature.
However SslOptions of the bundle is not honored by the implementation.

E.g. the gateway user would like to restrict the cipher suites of the outbound http client via SslBundle features. (or disable a protocol).

Sample
This specific implementation

misses the following:

SslOptions sslOptions = bundle.getOptions();
if (sslOptions != null && sslOptions.isSpecified()) {
  sslContextBuilder.ciphers(SslOptions.asSet(sslOptions.getCiphers()));
  sslContextBuilder.protocols(sslOptions.getEnabledProtocols());
}

I guess the GrpcSslConfigurer as well misses the same thing since it was also modified when #2981 solved by this commit 0600b4d