Fixed wrong root identification in module detection

[eranturgeman]

• The pull request is targeting the dev branch.
• The code has been validated to compile successfully by running go vet ./....
• The code has been formatted properly using go fmt ./....
• All static analysis checks passed.
• All tests have passed. If this feature is not already covered by the tests, new tests have been added.
• All changes are detailed at the description. if not already covered at JFrog Documentation, new documentation have been added.

---

In getExistingRootDir we find the highest common ancestor for every descriptor, and refer this descriptor to this common ancestor rather then its original working dir.
As part of the process we check under some condition, if the current wd is a prefix to the current root, and if so - wd is the new root.
We encountered a wrong identification in the following scenario: if wd is indeed a prefix to root but not a path prefix, we wrongfully take wd as the new root.
Example:
root = "dir1/dir2"
wd = "dir"

wd is indeed a prefix to root (by characters) but is not actually a path prefix since the path prefix to root is "dir1" and not "dir"

This PR adds fix for this issue so we identify if wd is a path prefix to the root

Also, this PR added a test case to TestGetTechInformationFromWorkingDir, that have failed due to the build, and is now added after the fix

[attiasas]

LGTM

[github-actions]

---

🐸 JFrog Frogbot