CmdPal: Properly quote arguments when rebuilding normalized path (#42071)

## Summary of the Pull Request

This PR ensures proper quoting of arguments after normalization. When
joining arguments back into a single string, any argument containing
whitespace or double quotes must be quoted (because parsing unquoted
them). Adjusts unit tests to reflect the correct expected results.

Ref: 42016

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## PR Checklist

- [ ] Closes: #xxx
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
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for new binaries
- [ ] [WXS for
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for new binaries and localization folder
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pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
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- [ ] **Documentation updated:** If checked, please file a pull request
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and link it here: #xxx

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## Detailed Description of the Pull Request / Additional comments

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## Validation Steps Performed

src/modules/cmdpal/Tests/Microsoft.CmdPal.Ext.Shell.UnitTests/NormalizeCommandLineTests.cs

@@ -23,6 +23,7 @@ public class NormalizeCommandLineTests : CommandPaletteUnitTestBase
     [DataRow("ping bing.com", "c:\\Windows\\system32\\ping.exe", "bing.com")]
     [DataRow("curl bing.com", "c:\\Windows\\system32\\curl.exe", "bing.com")]
     [DataRow("ipconfig /all", "c:\\Windows\\system32\\ipconfig.exe", "/all")]
+    [DataRow("ipconfig a b \"c d\"", "c:\\Windows\\system32\\ipconfig.exe", "a b \"c d\"")]
     public void NormalizeCommandLineSimple(string input, string expectedExe, string expectedArgs = "")
     {
         NormalizeTestCore(input, expectedExe, expectedArgs);
@@ -46,7 +47,7 @@ public class NormalizeCommandLineTests : CommandPaletteUnitTestBase
     [TestMethod]
     [DataRow("cmd --run --test", "C:\\Windows\\System32\\cmd.exe", "--run --test")]
     [DataRow("cmd    --run   --test  ", "C:\\Windows\\System32\\cmd.exe", "--run --test")]
-    [DataRow("cmd \"--run --test\" --pass", "C:\\Windows\\System32\\cmd.exe", "--run --test --pass")]
+    [DataRow("cmd \"--run --test\" --pass", "C:\\Windows\\System32\\cmd.exe", "\"--run --test\" --pass")]
     public void NormalizeArgsWithSpaces(string input, string expectedExe, string expectedArgs = "")
     {
         NormalizeTestCore(input, expectedExe, expectedArgs);