Add support for nightly test vectors (#15312)

* Add tool to download spec tests

* Rename consensus_spec_tests deps

* Make _get_redirected_url more portable

* Rename env variable

* Add a debug print for sanity

* Add changelog file

* Update newly added fulu tests

* Delete some unnecessary white space

* PR fixes

---------

Co-authored-by: Preston Van Loon <preston@pvl.dev>

config/params/BUILD.bazel

@@ -57,8 +57,7 @@ go_test(
     data = glob(["*.yaml"]) + [
         "testdata/e2e_config.yaml",
         "@consensus_spec//:spec_data",
-        "@consensus_spec_tests_mainnet//:test_data",
-        "@consensus_spec_tests_minimal//:test_data",
+        "@consensus_spec_tests//:test_data",
         "@eth2_networks//:configs",
         "@holesky_testnet//:configs",
         "@hoodi_testnet//:configs",