[Security Solutions] Flaky entity analytics cypress (elastic#162963)

Original issue: elastic#161874

## Summary

Flaky entity analytics cypress test

Based on my analysis, it seems likely that the issue was caused by some
tests failing to close the filter after opening it. This could have had
an impact on the subsequent tests.
After the change, I could run the test successfully more than 60 times.
Here is a print from some of these runs: 
<img width="587" alt="Screenshot 2023-08-04 at 13 58 55"
src="https:/elastic/kibana/assets/1490444/02367810-3616-4fa2-a82e-48c19e6ac4b6">

x-pack/plugins/security_solution/cypress/e2e/explore/dashboards/entity_analytics.cy.ts

@@ -33,7 +33,7 @@ import {
 } from '../../../screens/entity_analytics';
 import {
  openRiskTableFilterAndSelectTheLowOption,
- removeLowFilter,
+ removeLowFilterAndCloseRiskTableFilter,
 } from '../../../tasks/host_risk';
 import { createRule } from '../../../tasks/api_calls/rules';
 import { waitForAlertsToPopulate } from '../../../tasks/create_new_rule';
@@ -152,14 +152,13 @@ describe('Entity Analytics Dashboard', () => {
  cy.get(HOSTS_TABLE_ALERT_CELL).should('have.length', 5);
  });
 
- // tracked by https:/elastic/kibana/issues/161874
- it.skip('filters by risk classification', () => {
+ it('filters by risk classification', () => {
  openRiskTableFilterAndSelectTheLowOption();
 
  cy.get(HOSTS_DONUT_CHART).should('include.text', '1Total');
  cy.get(HOSTS_TABLE_ROWS).should('have.length', 1);
 
- removeLowFilter();
+ removeLowFilterAndCloseRiskTableFilter();
  });
 
  it('filters the host risk table with KQL search bar query', () => {
@@ -247,7 +246,7 @@ describe('Entity Analytics Dashboard', () => {
  cy.get(USERS_DONUT_CHART).should('include.text', '2Total');
  cy.get(USERS_TABLE_ROWS).should('have.length', 2);
 
- removeLowFilter();
+ removeLowFilterAndCloseRiskTableFilter();
  });
 
  it('filters the host risk table with KQL search bar query', () => {

x-pack/plugins/security_solution/cypress/e2e/explore/hosts/host_risk_tab.cy.ts

@@ -9,7 +9,7 @@ import { cleanKibana } from '../../../tasks/common';
 import {
  navigateToHostRiskDetailTab,
  openRiskTableFilterAndSelectTheCriticalOption,
- removeCriticalFilter,
+ removeCriticalFilterAndCloseRiskTableFilter,
  selectFiveItemsPerPageOption,
 } from '../../../tasks/host_risk';
 import {
@@ -50,7 +50,7 @@ describe('risk tab', () => {
 
  cy.get(HOST_BY_RISK_TABLE_CELL).eq(3).should('not.have.text', 'siem-kibana');
 
- removeCriticalFilter();
+ removeCriticalFilterAndCloseRiskTableFilter();
  });
 
  it('should be able to change items count per page', () => {

x-pack/plugins/security_solution/cypress/tasks/host_risk.ts

@@ -30,12 +30,14 @@ export const openRiskTableFilterAndSelectTheLowOption = () => {
  cy.get(HOST_BY_RISK_TABLE_FILTER_LOW).click();
 };
 
-export const removeLowFilter = () => {
+export const removeLowFilterAndCloseRiskTableFilter = () => {
  cy.get(HOST_BY_RISK_TABLE_FILTER_LOW).click();
+ cy.get(HOST_BY_RISK_TABLE_FILTER).first().click();
 };
 
-export const removeCriticalFilter = () => {
+export const removeCriticalFilterAndCloseRiskTableFilter = () => {
  cy.get(HOST_BY_RISK_TABLE_FILTER_CRITICAL).click();
+ cy.get(HOST_BY_RISK_TABLE_FILTER).first().click();
 };
 
 export const selectFiveItemsPerPageOption = () => {