Remove exported OpenSSL dependency from DHKEM

Summary:
D61632080 removes the OpenSSL usage from DHKEM internally, but it still left
the exported backend/OpenSSL header.

This diff removes the exported OpenSSL dependency from the target, and updates
callsites that were depending on this.

Reviewed By: zalecodez

Differential Revision: D62411511

fbshipit-source-id: fa41f2ceb42dd09999863ea3319160a0fbe3e57f

quic/fizz/client/handshake/test/BUCK

@@ -11,6 +11,7 @@ cpp_unittest(
     deps = [
         "fbsource//third-party/googletest:gmock",
         ":mock_psk_cache",
+        "//fizz/backend:openssl",
         "//fizz/client/test:mocks",
         "//fizz/crypto/test:TestUtil",
         "//fizz/protocol/clock/test:mock_clock",

quic/fizz/client/handshake/test/FizzClientHandshakeTest.cpp

@@ -13,6 +13,7 @@
 #include <condition_variable>
 #include <mutex>
 
+#include <fizz/backend/openssl/OpenSSL.h>
 #include <fizz/client/test/Mocks.h>
 #include <fizz/crypto/test/TestUtil.h>
 #include <fizz/protocol/clock/test/Mocks.h>

quic/samples/echo/BUCK

@@ -13,25 +13,26 @@ mvfst_cpp_library(
         "LogQuicStats.h",
     ],
     exported_deps = [
-        "//fizz/compression:zlib_certificate_decompressor",
-        "//fizz/compression:zstd_certificate_decompressor",
-        "//folly:file_util",
-        "//folly:synchronized",
-        "//folly/fibers:core",
-        "//folly/io/async:scoped_event_base_thread",
-        "//quic:constants",
-        "//quic:exception",
-        "//quic/api:transport",
-        "//quic/client:client",
-        "//quic/codec:types",
-        "//quic/common:buf_util",
-        "//quic/common/events:folly_eventbase",
-        "//quic/common/test:test_client_utils",
-        "//quic/common/test:test_utils",
-        "//quic/common/udpsocket:folly_async_udp_socket",
-        "//quic/fizz/client/handshake:fizz_client_handshake",
-        "//quic/server:server",
-        "//quic/state:stats_callback",
+        "fbcode//fizz/backend:openssl",
+        "fbcode//fizz/compression:zlib_certificate_decompressor",
+        "fbcode//fizz/compression:zstd_certificate_decompressor",
+        "fbcode//folly:file_util",
+        "fbcode//folly:synchronized",
+        "fbcode//folly/fibers:core",
+        "fbcode//folly/io/async:scoped_event_base_thread",
+        "fbcode//quic:constants",
+        "fbcode//quic:exception",
+        "fbcode//quic/api:transport",
+        "fbcode//quic/client:client",
+        "fbcode//quic/codec:types",
+        "fbcode//quic/common:buf_util",
+        "fbcode//quic/common/events:folly_eventbase",
+        "fbcode//quic/common/test:test_client_utils",
+        "fbcode//quic/common/test:test_utils",
+        "fbcode//quic/common/udpsocket:folly_async_udp_socket",
+        "fbcode//quic/fizz/client/handshake:fizz_client_handshake",
+        "fbcode//quic/server:server",
+        "fbcode//quic/state:stats_callback",
     ],
     exported_external_deps = [
         "glog",

quic/samples/echo/EchoClient.h

@@ -17,6 +17,7 @@
 #include <folly/fibers/Baton.h>
 #include <folly/io/async/ScopedEventBaseThread.h>
 
+#include <fizz/backend/openssl/OpenSSL.h>
 #include <fizz/compression/ZlibCertificateDecompressor.h>
 #include <fizz/compression/ZstdCertificateDecompressor.h>