SimplePerf: Use COMPUTERNAME instead of localhost

[bill-long]

Fixes #1075

Counter paths now reflect the computer name rather than localhost:

[PS] C:\code\CSS-Exchange\dist>Get-ExchangeServer | .\SimplePerf.ps1 -Start -Scenario None -IncludeCounters "\Network Interface(*)" -Verbose
LAB1E15: Removing existing SimplePerf collector.
LAB1E15: Getting list of counters.
LAB1E15: Applying filters.
LAB1E15: The following counters matched the specified filters:
LAB1E15: \\LAB1E15\Network Interface(*)\*
LAB1E15: Creating SimplePerf collector, writing to C:\SimplePerf\220523081812.
The command completed successfully.
LAB1E15: Starting SimplePerf collector.
The command completed successfully.
LAB1E16: Removing existing SimplePerf collector.
LAB1E16: Getting list of counters.
LAB1E16: Applying filters.
LAB1E16: The following counters matched the specified filters:
LAB1E16: \\LAB1E16\Network Interface(*)\*
LAB1E16: Creating SimplePerf collector, writing to C:\SimplePerf\220523121821.
The command completed successfully.
LAB1E16: Starting SimplePerf collector.
The command completed successfully.
LAB1E19-1: Removing existing SimplePerf collector.
LAB1E19-1: Getting list of counters.
LAB1E19-1: Applying filters.
LAB1E19-1: The following counters matched the specified filters:
LAB1E19-1: \\LAB1E19-1\Network Interface\*
LAB1E19-1: Creating SimplePerf collector, writing to C:\SimplePerf\220523081831.
The command completed successfully.
LAB1E19-1: Starting SimplePerf collector.
The command completed successfully.
LAB1E19-2: Getting list of counters.
LAB1E19-2: Applying filters.
LAB1E19-2: The following counters matched the specified filters:
LAB1E19-2: \\LAB1E19-2\Network Interface\*
LAB1E19-2: Creating SimplePerf collector, writing to C:\SimplePerf\220523081840.
The command completed successfully.

[dpaulson45]

An option as well is to not include the server's name in the counter. Similar to what we do for Exchange Daily Performance Logs:

vs

[bill-long]

Investigating the no-computer-name approach.

[bill-long]

I can't make the no-name approach work with a counter file. For example, if my counter file contains:

\Network Interface(*)\*

It doesn't collect anything. If prefixed with \\servername, then it does. The no-name approach does work with the -c parameter, but I'm hesitant to try to pass dozens of counter names as part of the command line.