This PR adds a helper function that returns a newly introduced `Site` struct that has a site ID and site webURL for a given m365 tenant.
---
#### Does this PR need a docs update or release note?
- [X] ⛔ No
#### Type of change
<!--- Please check the type of change your PR introduces: --->
- [X] 🌻 Feature
#### Issue(s)
<!-- Can reference multiple issues. Use one of the following "magic words" - "closes, fixes" to auto-close the Github issue. -->
* #2777
#### Test Plan
<!-- How will this be tested prior to merging.-->
- [X] ⚡ Unit test
```
--- PASS: TestM365IntegrationSuite (2.49s)
--- PASS: TestM365IntegrationSuite/TestSites (1.82s)
--- PASS: TestM365IntegrationSuite/TestSites/site (0.00s)
--- PASS: TestM365IntegrationSuite/TestSites/site#01 (0.00s)
--- PASS: TestM365IntegrationSuite/TestSites/site#02 (0.00s)
--- PASS: TestM365IntegrationSuite/TestSites/site#03 (0.00s)
--- PASS: TestM365IntegrationSuite/TestSites/site#04 (0.00s)
--- PASS: TestM365IntegrationSuite/TestSites/site#05 (0.00s)
--- PASS: TestM365IntegrationSuite/TestSites/site#06 (0.00s)
--- PASS: TestM365IntegrationSuite/TestSites/site#07 (0.00s)
--- PASS: TestM365IntegrationSuite/TestSites/site#08 (0.00s)
--- PASS: TestM365IntegrationSuite/TestSites/site#09 (0.00s)
--- PASS: TestM365IntegrationSuite/TestSites/site#10 (0.00s)
--- PASS: TestM365IntegrationSuite/TestSites/site#11 (0.00s)
--- PASS: TestM365IntegrationSuite/TestSites/site#12 (0.00s)
--- PASS: TestM365IntegrationSuite/TestSites/site#13 (0.00s)
--- PASS: TestM365IntegrationSuite/TestSites/site#14 (0.00s)
--- PASS: TestM365IntegrationSuite/TestSites/site#15 (0.00s)
--- PASS: TestM365IntegrationSuite/TestSites/site#16 (0.00s)
--- PASS: TestM365IntegrationSuite/TestSites/site#17 (0.00s)
```
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