Add additional packages to go branch

We're missing several packages that runsc doesn't depend on. Most notable are
several tcpip link packages.

To find packages, I looked at a diff of directories on master vs go:

$ bazel build //:gopath
$ find bazel-bin/gopath/src/gvisor.dev/gvisor/ -type d > /tmp/gopath.txt
$ find . -type d > /tmp/master.txt
$ sed 's|bazel-bin/gopath/src/gvisor.dev/gvisor/||' < /tmp/gopath.txt > /tmp/gopath.trunc.txt
$ sed 's|./||' < /tmp/master.txt > /tmp/master.trunc.txt
$ vimdiff /tmp/gopath.trunc.txt /tmp/master.trunc.txt

Testing packages are still left out because :gopath can't depend on testonly
targets...

PiperOrigin-RevId: 285049029

BUILD

@@ -23,7 +23,18 @@ go_path(
         "//runsc",
 
         # Packages that are not dependencies of //runsc.
+        "//pkg/sentry/kernel/memevent",
+        "//pkg/tcpip/adapters/gonet",
         "//pkg/tcpip/link/channel",
+        "//pkg/tcpip/link/muxed",
+        "//pkg/tcpip/link/sharedmem",
+        "//pkg/tcpip/link/sharedmem/pipe",
+        "//pkg/tcpip/link/sharedmem/queue",
+        "//pkg/tcpip/link/tun",
+        "//pkg/tcpip/link/waitable",
+        "//pkg/tcpip/sample/tun_tcp_connect",
+        "//pkg/tcpip/sample/tun_tcp_echo",
+        "//pkg/tcpip/transport/tcpconntrack",
     ],
 )
 

pkg/tcpip/sample/tun_tcp_connect/BUILD

@@ -5,6 +5,7 @@ package(licenses = ["notice"])
 go_binary(
     name = "tun_tcp_connect",
     srcs = ["main.go"],
+    visibility = ["//:sandbox"],
     deps = [
         "//pkg/tcpip",
         "//pkg/tcpip/buffer",

pkg/tcpip/sample/tun_tcp_echo/BUILD

@@ -5,6 +5,7 @@ package(licenses = ["notice"])
 go_binary(
     name = "tun_tcp_echo",
     srcs = ["main.go"],
+    visibility = ["//:sandbox"],
     deps = [
         "//pkg/tcpip",
         "//pkg/tcpip/link/fdbased",