[bazel] Disable parse_headers on gtest headers (#185138)
One of the headers has a circular dependency issue that makes it not
isolated
```
.../googletest/include/gtest/internal/custom/gtest-printers.h:53:12: error: no member named 'testing' in the global namespace
53 | *OS << ::testing::PrintToString(S.str());
| ~~^
```
