WinRM/PSRP: Ensure shell returns UTF-8 output (#47404)

* WinRM/PSRP: Ensure shell returns UTF-8 output

This PR makes UTF-8 output work in PSRP shells.

* Add win_command and win_shell integration tests

* Fix tests

* more test fixes

test/integration/targets/connection_psrp/tests.yml

@@ -59,3 +59,27 @@
     assert:
       that:
       - async_out.stdout_lines == ["abc"]
+
+  - name: Output unicode characters from Powershell using PSRP
+    win_command: "powershell.exe -ExecutionPolicy ByPass -Command \"Write-Host '\U0001F4A9'\""
+    register: command_unicode_output
+
+  - name: Assert unicode output
+    assert:
+      that:
+      - command_unicode_output is changed
+      - command_unicode_output.rc == 0
+      - "command_unicode_output.stdout == '\U0001F4A9\n'"
+      - command_unicode_output.stderr == ''
+
+  - name: Output unicode characters from Powershell using PSRP
+    win_shell: "Write-Host '\U0001F4A9'"
+    register: shell_unicode_output
+
+  - name: Assert unicode output
+    assert:
+      that:
+      - shell_unicode_output is changed
+      - shell_unicode_output.rc == 0
+      - "shell_unicode_output.stdout == '\U0001F4A9\n'"
+      - shell_unicode_output.stderr == ''

test/integration/targets/win_module_utils/library/command_util_test.ps1

@@ -76,6 +76,12 @@ Assert-Equals -actual $actual.rc -expected 0
 Assert-Equals -actual $actual.stdout -expected "stdout `r`n"
 Assert-Equals -actual $actual.stderr -expected "stderr `r`n"
 
+$test_name = "Test UTF8 output from stdout stream"
+$actual = Run-Command -command "powershell.exe -ExecutionPolicy ByPass -Command `"Write-Host '💩'`""
+Assert-Equals -actual $actual.rc -expected 0
+Assert-Equals -actual $actual.stdout -expected "💩`n"
+Assert-Equals -actual $actual.stderr -expected ""
+
 $test_name = "test default environment variable"
 Set-Item -Path env:TESTENV -Value "test"
 $actual = Run-Command -command "cmd.exe /c set"