test: disambiguate e2e and perf spec files (#34753)

Currently, based on the file names it's not quite clear whether
a given `.spec.ts` file runs benchmark perf or benchmark e2e
functionality tests. To disambiguate these, we use new file
suffixs. i.e. `e2e-spec.ts` and `perf-spec.ts`.

PR Close #34753

modules/benchmarks/src/js-web-frameworks/BUILD.bazel

@@ -5,7 +5,7 @@ package(default_visibility = ["//visibility:public"])
 ts_library(
     name = "perf_lib",
     testonly = True,
-    srcs = ["perf.spec.ts"],
+    srcs = ["js-web-frameworks.perf-spec.ts"],
     deps = [
         "//modules/e2e_util",
         "@npm//protractor",