Update Maven cache cleaning script for edge case

[alzimmermsft]

Description

Updates the Remove-Azure-Artifacts-From-Cache.ps1 script to handle an edge case where both the local build and Maven central metadata indicate that the project exists.

This image from one of the CI runs during a commit where I changed the version of azure-core-http-jdk-httpclient to an already released version it will delete the locally built version, even though 1.0.3 also exists in Maven central.

All SDK Contribution checklist:

• The pull request does not introduce [breaking changes]
• CHANGELOG is updated for new features, bug fixes or other significant changes.
• I have read the contribution guidelines.

General Guidelines and Best Practices

• Title of the pull request is clear and informative.
• There are a small number of commits, each of which have an informative message. This means that previously merged commits do not appear in the history of the PR. For more information on cleaning up the commits in your PR, see this page.

Testing Guidelines

• Pull request includes test coverage for the included changes.

[azure-sdk]

API change check

API changes are not detected in this pull request.

[alzimmermsft]

/check-enforcer override

[alzimmermsft]

Failing / timed out CI run unrelated to changes made in PR