Remove useGithubStorage from GHES version checker method

[begonaguereca]

Closes https://github.ghe.com/github/octoshift/issues/9649!

This pull request simplifies the method calls to AreBlobCredentialsRequired by removing the boolean parameter that checks for gitHubOwnedStorage.

While this produces the correct result, it is confusing for a reader. This PR refactors out that logic and adds the checks in the correct spots.

• [ ] Did you write/update appropriate tests
• [ ] Release notes updated (if appropriate)
• [ ] Appropriate logging output
• [ ] Issue linked
• [ ] Docs updated (or issue created)
• [ ] New package licenses are added to ThirdPartyNotices.txt (if applicable)

[github-actions[bot]]

Unit Test Results

834 tests   834 ✅  23s ⏱️   1 suites    0 💤   1 files      0 ❌

Results for commit edf88707.

:recycle: This comment has been updated with latest results.

[github-actions[bot]]

Package	Line Rate	Branch Rate	Complexity	Health
gei	80%	72%	554	✔
ado2gh	84%	78%	627	✔
Octoshift	87%	76%	1298	✔
bbs2gh	79%	74%	680	✔
Summary	84% (7039 / 8422)	76% (1597 / 2114)	3159	✔