Update Multiple Rules to cover the '-' flags along with '/' flags

[qasimqlf]

Summary of the Pull Request

Many binaries accepts both type of arguments that startswith '/' and '-'. So, i updated some rules having flags with '/' as prefix to check for '-' prefix as well. And i tested all updated flags.

Changelog

update: Esentutl Gather Credentials - Increase coverage by adding for the "/" option in commands flags
update: Copying Sensitive Files with Credential Data - Increase coverage by adding for the "/" option in commands flags
update: Explorer Process Tree Break - Increase coverage by adding for the "/" option in commands flags
update: LSASS Process Reconnaissance Via Findstr.EXE - Increase coverage by adding for the "/" option in commands flags
update: Self Extracting Package Creation Via Iexpress.EXE From Potentially Suspicious Location - Increase coverage by adding for the "/" option in commands flags
update: Lolbin Unregmp2.exe Use As Proxy - Increase coverage by adding for the "/" option in commands flags
update: New Remote Desktop Connection Initiated Via Mstsc.EXE - Increase coverage by adding for the "/" option in commands flags

Example Log Event

N/A

Fixed Issues

N/A

SigmaHQ Rule Creation Conventions

• If your PR adds new rules, please consider following and applying these conventions