Minor Improvement to Get-SuspiciousFiles

[nashiooka]

Issue:
Nothing specific.

Reason:
Minor readability and performance improvements.

Fix:

Store various filter strings and paths in variables for easier reference.
Consolidate 2 ForEach() loops used for searching for lsass.*dmp files to 1 loop ForEach-Object{} referencing an array of the 2 paths.
Convert ForEach() loop searching for archive files to ForEach-Object{}
Use the same loop with an if block to substitute for original Where{}. This approach is usually faster and is ideal since already using ForEach-Object{}

Validation:
Tested by creating bogus .dmp & archive files in relevant locations. Seems to work.

[bill-long]

Thank you!