build: watch for sauce service failures when waiting for it to start (#36109)

Also add two targets to make it more convienent to tail & dump the sauce service logs: //tools/saucelabs:sauce_service_tail & //tools/saucelabs:sauce_service_log

PR Close #36109

tools/saucelabs/BUILD.bazel

@@ -37,6 +37,20 @@ sh_binary(
     data = ["@npm//sauce-connect"],
 )
 
+sh_binary(
+    name = "sauce_service_tail",
+    srcs = ["sauce-service.sh"],
+    args = ["tail"],
+    data = ["@npm//sauce-connect"],
+)
+
+sh_binary(
+    name = "sauce_service_log",
+    srcs = ["sauce-service.sh"],
+    args = ["log"],
+    data = ["@npm//sauce-connect"],
+)
+
 nodejs_binary(
     name = "karma-saucelabs",
     data = [