Integv2 reduction

[dougch]

Description of changes:

The Integration tests in nix currently duplicate what's in the current integrationv2 tests, remove the duplicates.

Call-outs:

Doing this in chunks, this is PR one of 2-3.

Arguing we are testing with aws-lc, we should not bother with a ~2 year old pinned version of boringssl.

Diff between original an final:

--- a/codebuild/spec/buildspec_integv2batch2.yml
+++ b/codebuild/spec/buildspec_integv2batch2.yml
@@ -20,17 +20,14 @@ batch:
             - awslc-fips-2022_gcc6
             - libressl_gcc6
             - libressl_gcc9
-            - boringssl
             - openssl-1.0.2
             - openssl-1.0.2-fips
             - openssl-1.1.1_gcc4-8
             - openssl-1.1.1_gcc6
             - openssl-1.1.1_gcc6_softcrypto
             - openssl-1.1.1_gcc9
-          INTEGV2_TEST: 
+          INTEGV2_TEST:
             - "test_happy_path"
-            - "test_cross_compatibility test_client_authentication"
-            - "test_early_data test_sslyze test_well_known_endpoints test_hello_retry_requests test_sni_match test_pq_handshake test_fragmentation test_key_update"
-            - "test_session_resumption test_ocsp test_renegotiate test_renegotiate_apache"
-            - "test_dynamic_record_sizes test_npn test_signature_algorithms"
-            - "test_version_negotiation test_external_psk test_buffered_send"
+            - "test_sslyze test_fragmentation test_key_update"
+            - "test_session_resumption test_dynamic_record_sizes"
+            - "test_version_negotiation test_external_psk"

Testing:

How is this change tested: locally, ad-hoc

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