[HDRP Template] Upgrade Input System to 1.8.1 in 3D Sample

[jfreire-unity]

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Purpose of this PR

• Upgrading to latest Input System package 1.8.1
• Changing Project Settings > Active Input Handling to "Both". This should overcome issues with UGUI reported here.

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Testing status

❌ No local testing done yet

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Comments to reviewers

Notes for the reviewers you have assigned.

[lyndon-unity]

Need to add EditorBuildAsset file that references InputSystem_Actions.asset

Currently this file has no reference to the newly created project wide input actions asset in the Assets folder

Graphics/com.unity.template-hd/ProjectSettings/EditorBuildSettings.asset

Line 11 in 18c33bd

m_configObjects: {}

[Pauliusd01]

• I see that the player is set to use both input backends but there's no PWA asset by default, shouldn't that be changed?
• There's supposed to be 2 types of HDRP projects an empty one and sample one and it seems like only the sample one was changed. Shouldn't both be changed?
• Is this template project supposed to be spamming all these errors?
  

[lyndon-unity]

Config objects info in EditorBuildSettings looks good - but looks like one extra unnecessary line changes which is probably not needed and may have a side effect. Suggest manually putting that one line back

[lyndon-unity]

This line change is probably unnecessary AFAICT - can you revert that one line?

[graham-huws]

Sure, can do - the (updated) path is correct though, the old one doesn't exist, is that fine?

[lyndon-unity]

Ok if that's a correction then great lets land it as is. Thank you.

[Pauliusd01]

LGTM, the player is set to use both backends, EventSystem no longer throws the errors and a default ProjectWideActions asset is present in the main Assets directory (The only thing that might be a bit odd that It's just a loose file instead of being nested in some Settings folder)

Also, double checked basic uGUI and UIToolkit functionality by creating and checking functionality of buttons, toggles, input fields, etc.

[lyndon-unity]

Ok if that's a correction then great lets land it as is. Thank you.

[LagueKristin]

Fixed outstanding issues, bumped version and changelog changes!