crypto: use testenv.Executable(t) instead of os.Args[0] in tests

Change-Id: Ib0ec1f05e51a4295a9369d6e8c6b61976a6a6964
Reviewed-on: https://go-review.googlesource.com/c/go/+/735260
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>
Reviewed-by: Daniel McCarney <daniel@binaryparadox.net>
Auto-Submit: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Michael Pratt <mpratt@google.com>

src/crypto/internal/fips140test/acvp_test.go

@@ -2146,7 +2146,7 @@ func TestACVP(t *testing.T) {
 	}
 	configPath := filepath.Join(cwd, testConfigFile)
 	t.Logf("running check_expected.go\ncwd: %q\ndata_dir: %q\nconfig: %q\ntool: %q\nmodule-wrapper: %q\n",
-		cwd, dataDir, configPath, toolPath, os.Args[0])
+		cwd, dataDir, configPath, toolPath, testenv.Executable(t))
 
 	// Run the check_expected test driver using the acvptool we built, and this test binary as the
 	// module wrapper. The file paths in the config file are specified relative to the dataDir root
@@ -2157,7 +2157,7 @@ func TestACVP(t *testing.T) {
 		"-tool",
 		toolPath,
 		// Note: module prefix must match Wrapper value in testConfigFile.
-		"-module-wrappers", "go:" + os.Args[0],
+		"-module-wrappers", "go:" + testenv.Executable(t),
 		"-tests", configPath,
 	}
 	cmd = testenv.Command(t, testenv.GoToolPath(t), args...)

src/crypto/internal/fips140test/check_test.go

@@ -46,7 +46,7 @@ func TestIntegrityCheckFailure(t *testing.T) {
 	moduleStatus(t)
 	cryptotest.MustSupportFIPS140(t)
 
-	bin, err := os.ReadFile(os.Args[0])
+	bin, err := os.ReadFile(testenv.Executable(t))
 	if err != nil {
 		t.Fatal(err)
 	}

src/crypto/tls/bogo_shim_test.go

@@ -577,7 +577,7 @@ func TestBogoSuite(t *testing.T) {
 		"test",
 		".",
 		fmt.Sprintf("-shim-config=%s", filepath.Join(cwd, "bogo_config.json")),
-		fmt.Sprintf("-shim-path=%s", os.Args[0]),
+		fmt.Sprintf("-shim-path=%s", testenv.Executable(t)),
 		"-shim-extra-flags=-bogo-mode",
 		"-allow-unimplemented",
 		"-loose-errors", // TODO(roland): this should be removed eventually