refactor: cleanup legacy sinon sandboxing (#7066)

Co-authored-by: repo-ranger[bot] <39074581+repo-ranger[bot]@users.noreply.github.com>

core/base-service/base.spec.js

@@ -124,15 +124,11 @@ describe('BaseService', function () {
   })
 
   describe('Logging', function () {
-    let sandbox
     beforeEach(function () {
-      sandbox = sinon.createSandbox()
+      sinon.stub(trace, 'logTrace')
     })
     afterEach(function () {
-      sandbox.restore()
-    })
-    beforeEach(function () {
-      sandbox.stub(trace, 'logTrace')
+      sinon.restore()
     })
     it('Invokes the logger as expected', async function () {
       await DummyService.invoke(
@@ -426,15 +422,11 @@ describe('BaseService', function () {
   })
 
   describe('request', function () {
-    let sandbox
     beforeEach(function () {
-      sandbox = sinon.createSandbox()
+      sinon.stub(trace, 'logTrace')
     })
     afterEach(function () {
-      sandbox.restore()
-    })
-    beforeEach(function () {
-      sandbox.stub(trace, 'logTrace')
+      sinon.restore()
     })
 
     it('logs appropriate information', async function () {

core/base-service/cache-headers.spec.js

@@ -99,14 +99,11 @@ describe('Cache header functions', function () {
   })
 
   describe('setHeadersForCacheLength', function () {
-    let sandbox
     beforeEach(function () {
-      sandbox = sinon.createSandbox()
-      sandbox.useFakeTimers()
+      sinon.useFakeTimers()
     })
     afterEach(function () {
-      sandbox.restore()
-      sandbox = undefined
+      sinon.restore()
     })
 
     it('should set the correct Date header', function () {

core/base-service/validate.spec.js

@@ -10,15 +10,11 @@ describe('validate', function () {
     requiredString: Joi.string().required(),
   }).required()
 
-  let sandbox
   beforeEach(function () {
-    sandbox = sinon.createSandbox()
+    sinon.stub(trace, 'logTrace')
   })
   afterEach(function () {
-    sandbox.restore()
-  })
-  beforeEach(function () {
-    sandbox.stub(trace, 'logTrace')
+    sinon.restore()
   })
 
   const ErrorClass = InvalidParameter