Simplify mocha nodeOptions (#25293)

## Description

Remove unnecessary mocha config logic that's already in the base config.

Author: CraigMacomber

examples/benchmarks/tablebench/.mocharc.customBenchmarks.cjs

@@ -13,19 +13,11 @@ const getFluidTestMochaConfig = require("@fluid-internal/mocha-test-setup/mochar
 const packageDir = __dirname;
 const baseConfig = getFluidTestMochaConfig(packageDir);
 
-const nodeOptions =
-	baseConfig["node-option"] !== undefined
-		? Array.isArray(baseConfig["node-option"])
-			? baseConfig["node-option"]
-			: [baseConfig["node-option"]] // If string, wrap as array to use spread operator
-		: []; // If undefined, use an empty array
-
-nodeOptions.push("expose-gc", "gc-global", "unhandled-rejections=strict");
+baseConfig["node-option"].push("gc-global");
 
 module.exports = {
 	...baseConfig,
 	"fgrep": ["@CustomBenchmark"],
-	"node-option": nodeOptions, // without leading "--"
 	"recursive": true,
 	"reporter": "@fluid-tools/benchmark/dist/MochaReporter.js",
 	"reporterOptions": ["reportDir=.customBenchmarksOutput/"],

packages/dds/tree/.mocharc.customBenchmarks.cjs

@@ -13,19 +13,11 @@ const getFluidTestMochaConfig = require("@fluid-internal/mocha-test-setup/mochar
 const packageDir = __dirname;
 const baseConfig = getFluidTestMochaConfig(packageDir);
 
-const nodeOptions =
-	baseConfig["node-option"] !== undefined
-		? Array.isArray(baseConfig["node-option"])
-			? baseConfig["node-option"]
-			: [baseConfig["node-option"]] // If string, wrap as array to use spread operator
-		: []; // If undefined, use an empty array
-
-nodeOptions.push("expose-gc", "gc-global", "unhandled-rejections=strict");
+baseConfig["node-option"].push("gc-global");
 
 module.exports = {
 	...baseConfig,
 	"fgrep": ["@CustomBenchmark"],
-	"node-option": nodeOptions, // without leading "--"
 	"recursive": true,
 	"reporter": "@fluid-tools/benchmark/dist/MochaReporter.js",
 	"reporterOptions": ["reportDir=.customBenchmarksOutput/"],

packages/dds/tree/src/test/memory/.mocharc.cjs

@@ -8,18 +8,11 @@
  */
 
 const baseConfig = require("../../../.mocharc.cjs");
-
-const baseNodeOptions =
-	baseConfig["node-option"] !== undefined
-		? Array.isArray(baseConfig["node-option"])
-			? baseConfig["node-option"]
-			: [baseConfig["node-option"]] // If string, wrap as array to use spread operator
-		: []; // If undefined, use an empty array
+baseConfig["node-option"].push("gc-global");
 
 const extendedConfig = {
 	...baseConfig,
 	"fgrep": ["@Benchmark", "@MemoryUsage"],
-	"node-option": [...baseNodeOptions, "expose-gc", "gc-global", "unhandled-rejections=strict"], // without leading "--"
 	"reporter": "@fluid-tools/benchmark/dist/MochaReporter.js",
 	"reporterOptions": ["reportDir=.memoryTestsOutput/"],
 };