[Feature Request]: Support HTTPS proxies and self-signed certificates for GCS staging

### What would you like to happen?

Creating dataflow pipelines via Proxy Server with own java trust store will encounter certificate error:
```
WARNING: exception thrown while executing request
java.net.UnknownHostException: www.googleapis.com
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:673)
at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
at sun.net.www.protocol.https.HttpsClient.(HttpsClient.java:264)
at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:162)
at com.google.api.client.http.javanet.NetHttpRequest.execute(NetHttpRequest.java:93)
```
this is due to the hardcoded google vendored trust store in [java-api-library](https://github.com/googleapis/google-api-java-client/blob/main/google-api-client/src/main/java/com/google/api/client/googleapis/GoogleUtils.java#L85). To support customer supplied certificates (mTLS) it needs to upgrade google-api-client dependency to [1.38.0](https://github.com/googleapis/google-api-java-client/issues/1114#issuecomment-796099858) and expose it in beam sdk.

### Issue Priority

Priority: 2

### Issue Component

Component: io-java-gcp