Flaky test fix: Skip worker jobs to avoid race conditions in tests (#40536)

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**Related issue:** Resolves #40535

Fixes a flaky test (and possibly others) by turning off worker jobs
while the test is running. @gillespi314 did a similar fix recently in
https://github.com/fleetdm/fleet/pull/39106; this adds it to other
vulnerable tests including
`TestSetupExperienceFlowWithRequiredSoftwareVPP` which I recently got a
failure on in CI.

server/service/integration_mdm_setup_experience_test.go

@@ -583,6 +583,8 @@ func (s *integrationMDMTestSuite) TestSetupExperienceFlowWithSoftwareAndScriptFo
 	t := s.T()
 	ctx := context.Background()
 
+	s.setSkipWorkerJobs(t)
+
 	teamDevice, enrolledHost, _ := s.createTeamDeviceForSetupExperienceWithProfileSoftwareAndScript()
 
 	// enroll the host
@@ -739,6 +741,8 @@ func (s *integrationMDMTestSuite) TestSetupExperienceVPPInstallError() {
 	t := s.T()
 	ctx := context.Background()
 
+	s.setSkipWorkerJobs(t)
+
 	teamDevice, enrolledHost, team := s.createTeamDeviceForSetupExperienceWithProfileSoftwareAndScript()
 
 	orgName := "Fleet Device Management Inc."
@@ -1190,6 +1194,8 @@ func (s *integrationMDMTestSuite) TestSetupExperienceFlowCancelScript() {
 	t := s.T()
 	ctx := context.Background()
 
+	s.setSkipWorkerJobs(t)
+
 	device, host, _ := s.createTeamDeviceForSetupExperienceWithProfileSoftwareAndScript()
 
 	// enroll the host
@@ -3000,6 +3006,8 @@ func (s *integrationMDMTestSuite) TestSetupExperienceFlowWithRequiredSoftwareVPP
 	t := s.T()
 	ctx := context.Background()
 
+	s.setSkipWorkerJobs(t)
+
 	teamDevice, enrolledHost, team := s.createTeamDeviceForSetupExperienceWithProfileSoftwareAndScript()
 
 	payload := map[string]any{