Call clang-tidy with -fno-caret-diagnostics by default.

* clang -fno-caret-diagnostics
  suppresses warning source lines, carets, and
  the stats line of "n warnings generated"
* clang-tidy -extra-arg-before=-fno-caret-diagnotics
  only suppresses the "n warnings generated" line.
* Pass this flag and -quiet to clang-tidy when
  WITH_TIDY is not 1 or true.

Bug: 69051430
Test: normal build and build with WITH_TIDY=1

Change-Id: I34e34cddc0e7329e73b5f04da4b1458dabfcd4c8

cc/tidy.go

@@ -80,6 +80,7 @@ func (tidy *tidyFeature) flags(ctx ModuleContext, flags Flags) Flags {
 	// If clang-tidy is not enabled globally, add the -quiet flag.
 	if !ctx.Config().ClangTidy() {
 		flags.TidyFlags = append(flags.TidyFlags, "-quiet")
+		flags.TidyFlags = append(flags.TidyFlags, "-extra-arg-before=-fno-caret-diagnostics")
 	}
 
 	// We might be using the static analyzer through clang tidy.