[opentitantool] Fix OTP tests to work under bazel

Moves OTP test data to a more appropriate location and adds them to the
bazel BUILD file to fix "file not found" errors encountered when running
`bazel run //sw/host/opentitanlib:opentitanlib_test`.

Signed-off-by: Jon Flatley <jflat@google.com>
diff --git a/sw/host/opentitanlib/BUILD b/sw/host/opentitanlib/BUILD
index 0273769..71aee5b 100644
--- a/sw/host/opentitanlib/BUILD
+++ b/sw/host/opentitanlib/BUILD
@@ -82,5 +82,9 @@
     data = [
         "src/util/testdata/hello.txt",
         "src/util/testdata/world.txt",
+        "src/otp/testdata/lc_ctrl_state.hjson",
+        "src/otp/testdata/otp_ctrl_img_dev.hjson",
+        "src/otp/testdata/otp_ctrl_mmap.hjson",
+        "src/otp/testdata/output.vmem",
     ],
 )