Disable clang-tidy for some netd tests.

On my machine, this cuts resolv_integration_test build time from
1m36 to 20s, and netd_integration_test build time from 1m06 to
15s.  Running clang-tidy on test code is not particularly valuable
for finding security vulnerabilities, and life is short.

Test: atest resolv_integration_test
Change-Id: I3bf97e937c333bf9e8ac68ddeecea63fe05a1dc1