fix(bundler/nsis): use temp dir for webview2 installer, closes #7409

[jetli]

What kind of change does this PR introduce?

• Bugfix
• Feature
• Docs
• New Binding issue #___
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change?

• Yes, and the changes were approved in issue #___
• No

Checklist

• When resolving issues, they are referenced in the PR's title (e.g fix: remove a typo, closes #___, #___)
• A change file is added if any packages will require a version bump due to this PR per the instructions in the readme.
• I have added a convincing reason for adding this feature, if necessary

Other information

[amrbashir]

Oh looks like you didn't sign your commits and I can't merge the PR unless they are signed. You need to setup commit signing, then you can sign past commit like this for example.

[jetli]

Oh looks like you didn't sign your commits and I can't merge the PR unless they are signed. You need to setup commit signing, then you can sign past commit like this for example.

@amrbashir signed the commit

[jetli]

and should I send another pr for 2.0 dev branch?

[FabianLars]

Nope. We will merge the 1.x branch into dev one last time when 1.5 is released.