fix(assets): Adjust project transitive output path (backport #18966)

[mergify]

PR Type

What kind of change does this PR introduce?

• Bugfix

What is the new behavior?

• Adjust transitive assets output paths based on updated hashed wasm output path
• Removes unused devserver for net9

PR Checklist

Please check if your PR fulfills the following requirements:

• Docs have been added/updated which fit documentation template (for bug fixes / features)
• Unit Tests and/or UI Tests for the changes have been added (for bug fixes / features) (if applicable)
• Validated PR Screenshots Compare Test Run results.
• Contains NO breaking changes
• Associated with an issue (GitHub or internal) and uses the automatic close keywords.
• Commits must be following the Conventional Commits specification.

Other information

Internal Issue (If applicable):

---

This is an automatic backport of pull request #18966 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 983b96d has failed:

On branch mergify/bp/release/stable/5.5/pr-18966
Your branch is up to date with 'origin/release/stable/5.5'.

You are currently cherry-picking commit 983b96d7d9.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   src/SolutionTemplate/5.3/uno53AppWithLib/uno53AppWithLib/uno53AppWithLib.csproj
	modified:   src/SourceGenerators/Uno.UI.Tasks/Content/uno.ui.tasks.assets.targets

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   src/Directory.Build.targets
	both modified:   src/SamplesApp/SamplesApp.Wasm/SamplesApp.Wasm.csproj

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[unodevops]

⚠️⚠️ The build 149002 has failed on Uno.UI - CI.

[unodevops]

🤖 Your Docs stage site is ready! Visit it here: https://unodocsprstaging.z13.web.core.windows.net/pr-18974/index.html

[unodevops]

🤖 Your WebAssembly Sample App stage site is ready! Visit it here: https://unowasmprstaging.z20.web.core.windows.net/pr-18974/index.html

[unodevops]

⚠️⚠️ The build 149018 has failed on Uno.UI - CI.