cloud_roles: add tests

Signed-off-by: Noah Watkins <noahwatkins@gmail.com>

src/v/cloud_roles/tests/BUILD

@@ -0,0 +1,32 @@
+load("//bazel:test.bzl", "redpanda_cc_btest")
+
+redpanda_cc_btest(
+    name = "signature_test",
+    timeout = "short",
+    srcs = [
+        "signature_test.cc",
+    ],
+    deps = [
+        "//src/v/cloud_roles:signature",
+        "//src/v/http",
+        "//src/v/test_utils:seastar_boost",
+        "@abseil-cpp//absl/strings",
+        "@boost//:test",
+        "@seastar",
+        "@seastar//:testing",
+    ],
+)
+
+redpanda_cc_btest(
+    name = "schema_parsing_test",
+    timeout = "short",
+    srcs = [
+        "schema_parsing_tests.cc",
+    ],
+    deps = [
+        "//src/v/bytes:streambuf",
+        "//src/v/cloud_roles:request_response_helpers",
+        "//src/v/test_utils:seastar_boost",
+        "@boost//:test",
+    ],
+)