style(netfault): rename tc->tt in TestOptsProviderMatrix loop var

Match the package convention for table tests (every other table test in
this file uses tt). Also avoids the visual collision with tc-as-in-traffic-
control all over this netfault package.

Author: joshiste

go/action_kit_commons/network/netfault/netfault_test.go

@@ -124,14 +124,14 @@ func TestOptsProviderMatrix(t *testing.T) {
 		{"LimitBandwidthOpts", &LimitBandwidthOpts{}, false, true, false},
 		{"TcpResetOpts", &TcpResetOpts{}, false, false, true},
 	}
-	for _, tc := range cases {
-		t.Run(tc.name, func(t *testing.T) {
-			_, isIp := tc.opts.(ipCommandProvider)
-			_, isTc := tc.opts.(tcCommandProvider)
-			_, isIptables := tc.opts.(iptablesScriptProvider)
-			assert.Equal(t, tc.hasIp, isIp, "ipCommandProvider")
-			assert.Equal(t, tc.hasTc, isTc, "tcCommandProvider")
-			assert.Equal(t, tc.hasIptables, isIptables, "iptablesScriptProvider")
+	for _, tt := range cases {
+		t.Run(tt.name, func(t *testing.T) {
+			_, isIp := tt.opts.(ipCommandProvider)
+			_, isTc := tt.opts.(tcCommandProvider)
+			_, isIptables := tt.opts.(iptablesScriptProvider)
+			assert.Equal(t, tt.hasIp, isIp, "ipCommandProvider")
+			assert.Equal(t, tt.hasTc, isTc, "tcCommandProvider")
+			assert.Equal(t, tt.hasIptables, isIptables, "iptablesScriptProvider")
 		})
 	}
 }