message: Refactor CMake files in cc/signature.
diff: @@ -444,10 +444,10 @@ tink_cc_test(
  SRCS
  ecdsa_verify_key_manager_test.cc
  DEPS
  - absl::status
  tink::signature::ecdsa_sign_key_manager
  tink::signature::ecdsa_verify_key_manager
  gmock
  + absl::status
  tink::core::public_key_sign
  tink::core::public_key_verify
  tink::subtle::ecdsa_sign_boringssl
  @@ -487,7 +487,6 @@ tink_cc_test(
  SRCS
  rsa_ssa_pkcs1_verify_key_manager_test.cc
  DEPS
  - tink::internal::ssl_unique_ptr
  tink::signature::rsa_ssa_pkcs1_sign_key_manager
  tink::signature::rsa_ssa_pkcs1_verify_key_manager
  gmock
  @@ -498,6 +497,7 @@ tink_cc_test(
  tink::core::public_key_verify
  tink::internal::bn_util
  tink::internal::rsa_util
  + tink::internal::ssl_unique_ptr
  tink::subtle::rsa_ssa_pkcs1_sign_boringssl
  tink::util::secret_data
  tink::util::status
  @@ -523,6 +523,7 @@ tink_cc_test(
  tink::core::public_key_verify
  tink::internal::bn_util
  tink::internal::rsa_util
  + tink::internal::ssl_unique_ptr
  tink::subtle::rsa_ssa_pss_sign_boringssl
  tink::util::secret_data
  tink::util::status
  @@ -537,10 +538,10 @@ tink_cc_test(
  SRCS
  ecdsa_sign_key_manager_test.cc
  DEPS
  - absl::status
  tink::signature::ecdsa_sign_key_manager
  tink::signature::ecdsa_verify_key_manager
  gmock
  + absl::status
  tink::core::public_key_sign
  tink::core::public_key_verify
  tink::subtle::ecdsa_verify_boringssl
  @@ -575,7 +576,6 @@ tink_cc_test(
  tink::util::test_matchers
  tink::util::test_util
  tink::proto::ed25519_cc_proto
  - tink::proto::ed25519_cc_proto
  )
  tink_cc_test(
  @@ -605,7 +605,6 @@ tink_cc_test(
  SRCS
  rsa_ssa_pss_sign_key_manager_test.cc
  DEPS
  - tink::internal::ssl_unique_ptr
  tink::signature::rsa_ssa_pss_sign_key_manager
  tink::signature::rsa_ssa_pss_verify_key_manager
  tink::signature::signature_key_templates
  @@ -615,6 +614,7 @@ tink_cc_test(
  tink::core::public_key_sign
  tink::internal::bn_util
  tink::internal::rsa_util
  + tink::internal::ssl_unique_ptr
  tink::subtle::rsa_ssa_pss_verify_boringssl
  tink::util::status
  tink::util::statusor
  @@ -652,7 +652,6 @@ tink_cc_test(
  SRCS
  signature_key_templates_test.cc
  DEPS
  - tink::internal::ssl_unique_ptr
  tink::signature::ecdsa_sign_key_manager
  tink::signature::ecdsa_verify_key_manager
  tink::signature::ed25519_sign_key_manager
  