microsoft_defender_endpoint: ensure $skip parameter is correctly formatted

[kcreddy]

Proposed commit message

microsoft_defender_endpoint: ensure $skip parameter is correctly formatted

The values used to populate this parameter can be greater than the
cutover to e-notation for doubles, so convert to int before converting
to string.

Fix is similar to #15392 as it the same API and CEL program.

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.
• I have verified that any added dashboard complies with Kibana's Dashboard good practices

[elasticmachine]

Pinging @elastic/security-service-integrations (Team:Security-Service Integrations)

[elastic-sonarqube]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 30e9c8a

cc @kcreddy

[elastic-vault-github-plugin-prod]

Package microsoft_defender_endpoint - 3.1.1 containing this change is available at https://epr.elastic.co/package/microsoft_defender_endpoint/3.1.1/