Try to dedup crash dump files

Author: vmoroz

.ado/jobs/e2e-test.yml

@@ -143,7 +143,14 @@ jobs:
                 yarn e2etest
               displayName: yarn e2etest
               workingDirectory: packages/e2e-test-app-fabric
-              timeoutInMinutes: 10 # Time to wait for this task to complete before the server kills it.
+              # Time to wait for this task to complete before the server kills it.
+              # When simulateCrashForTesting=true the app crashes immediately on startup, so a
+              # 10-minute wait is just dead time. Drop to 2 min during simulation. REVERT this
+              # to a single `timeoutInMinutes: 10` when removing the simulation parameter.
+              ${{ if eq(parameters.simulateCrashForTesting, true) }}:
+                timeoutInMinutes: 2
+              ${{ if not(eq(parameters.simulateCrashForTesting, true)) }}:
+                timeoutInMinutes: 10
 
             # Always disarm the crash sentinel so it cannot leak to a rerun on
             # the same agent.
@@ -261,12 +268,21 @@ jobs:
                   "$env:TEMP",
                   "$env:windir\Temp"
                 )
+                # Exclude our own in-process dump folder so the C:\Users scan
+                # (which traverses the C:\Users\All Users junction to ProgramData)
+                # doesn't duplicate dumps that are already under in-process/.
+                $inProcReal = (Resolve-Path -LiteralPath $inProc -ErrorAction SilentlyContinue)
                 $found = @()
                 foreach ($root in $searchRoots) {
                   if (-not (Test-Path $root)) { continue }
                   Write-Host "--- $root ---"
                   $hits = Get-ChildItem -Path $root -Recurse -Include *.dmp,*.mdmp,*RNTesterApp*.* -ErrorAction SilentlyContinue -Force |
-                    Where-Object { -not $_.PSIsContainer -and $_.LastWriteTime -gt (Get-Date).AddHours(-2) }
+                    Where-Object {
+                      -not $_.PSIsContainer -and
+                      $_.LastWriteTime -gt (Get-Date).AddHours(-2) -and
+                      ($null -eq $inProcReal -or -not $_.FullName.StartsWith($inProcReal.Path, [System.StringComparison]::OrdinalIgnoreCase)) -and
+                      $_.FullName -notlike '*\RNW-E2E-Dumps\*'
+                    }
                   foreach ($h in $hits) {
                     Write-Host ("  {0,-10} {1}" -f $h.Length, $h.FullName)
                     $found += $h