Update AzureSearchAdminKey detector

[rgmz]

Description:

There are a number of problems with this detector. This Pr attempts to fix some of the glaring issues.

e.g.,

Verification issue: unexpected HTTP response status 400 | {"error":{"code":"","message":"Service name must only contain lowercase letters, digits or dashes, cannot start or end with or contain consecutive dashes and is limited to 60 characters."}}

Checklist:

• [x] Tests passing (make test-community)?
• [ ] Lint passing (make lint this requires golangci-lint)?