[SIEMINT-122] DDSaaS: Brevo: Integration v1.0.0 (#18564)

* brevo integration project skeleton

* brevo.svg added

* added all assets and modified readme, manifest files

* added more samples

* minor correction in sample

* changed dashboards, corrections in readme,manifest

* to resolve failed checks

* dashboard and pipeline changes

* minor corrections

* fixing pipeline failure

* fixing pipeline failure

* fixing pipeline failure

* Updated Dashboard and Pipeline

* fixing pipeline failure

* minor corrections in dashboard and pipeline

* minor dashbaord changes

* minor dashbaord change

* Update README and monitor descriptions

* Fix character limit issue in monitor descriptions

* minor change in dashboards

* change in dashboard and pipeline

* fix pipeline failure

* change in dashboard

* changed image and modified monitor content

* Updated monitor description and title

* whitespace omitted

* Modified sample logs for transactional events

* Fix log samples failure

* CODEOWNERS

* Integration name removed from monitors

* review comments incorporated

* README.md modified

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Co-authored-by: Bhavik Parmar <[email protected]>
Co-authored-by: Bhavik Parmar <[email protected]>
Co-authored-by: apiazza-dd <[email protected]> 8c575d7