Align known_issues.json match_flag field with pipeline-csv.ps1

This script uses the known-issues.json file owned by the pipeline-csv.ps1 script. The match_flag behavior is different than the script. This PR fixes that.

The pipeline-csv.ps1 script prepends the match with (?m) if match_flag is equal to multiline and if it isn't, it prepends the match with (?s) if match_flag equals dotmatchall. If the match_all field doesn't match either then the flags used are not modified.

        if ($item.match_flag -eq "multiline") {
            $item.match = "(?m)$($item.match)"
        }
        elseif ($item.match_flag -eq "dotmatchall") {
            $item.match = "(?s)$($item.match)"
        }

...

    foreach ($def in $definitions) {
        if ($def.name -match $defRegex) {
            $defIds += $def.id
            Write-Host "$($def.name)"
        }
    }

(?m): ^$ match line endings instead of string endings
(?s): . matches carriage return and linefeed characters
pipeline-csv.ps1 script uses -match which in powershell is a synonym for -imatch, which is a case insensitive match

In javascript, the equivalent of:

(?m) is m
(?s) is s (already handled)
-match is i

alejandro5042 / azdo-userscripts

Align known_issues.json match_flag field with pipeline-csv.ps1 #189