Updated to latest SPFx version and graph call replaced with azure function

[HarminderSethi]

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Put an x in all the items that apply ([x], no spaces between the [, the x, and the ] ), make notes next to any that haven't been addressed.

• New sample
• Bug fix/update
• Related issues: fixes react-m365-services-health - 403 Forbidden when calling MS Graph #3793

What's in this Pull Request?

ServiceHealth.Read.All end point was not working using Graph api in SPFx since last july so replaced the Graph API call with Azure function.
Azure function will provide the functionality to get the service health using Delegated permission(requires Message Center Reader role for the logged in user or using Application permission.
Updated the SPFx version to 1.18.2

Node Version

(Use node -v to get the version of Node you used to build this sample)

Node version used: 18.17.1

Checklist

• My pull request affects only ONE sample.
• My sample builds without any warnings
• I have updated the README.md file's Version history. For new samples, created a new README.md file matching this template
• My README.md has at least one static high-resolution screenshot (i.e. not a GIF) located in the assets folder.
• My README.md contains complete setup instructions, including pre-requisites and permissions required
• My solution includes a .nvmrc file indicating the version of Node.js

[hugoabernier]

Thank you @HarminderSethi ! Just listing the bug number in your PR and prefixing it with "fixes" automatically attaches (and closes) the associated issue.

Much appreciated!