Filter RSA 3072 tests

Merge from Widevine repo of http://go/wvgerrit/169089

We want to transition to using GTEST_SKIP to skip unit tests instead of
modifying the GTEST_FILTER variable. This does so for tests that require
RSA 3072 support. Note: I think part of this CL got lost in
go/wvgerrit/167740, so this is adding the rest in.

Bug: 251240681
Merged from https://widevine-internal-review.googlesource.com/168237

Change-Id: I3002f705f7e3f4b38d0e5efef355e5c3f3529218

libwvdrmengine/oemcrypto/test/oemcrypto_provisioning_test.cpp

@@ -898,6 +898,9 @@ class OEMCryptoLoadsCertVariousKeys : public OEMCryptoLoadsCertificate {
 
 // Test a 3072 bit RSA key certificate.
 TEST_F(OEMCryptoLoadsCertVariousKeys, TestLargeRSAKey3072) {
+  if (!global_features.supports_rsa_3072) {
+    GTEST_SKIP() << "OEMCrypto does not support RSA 3072";
+  }
   TestKey(kTestRSAPKCS8PrivateKeyInfo3_3072,
           sizeof(kTestRSAPKCS8PrivateKeyInfo3_3072));
 }