Make assert-pure.ql ignore all /vscode/ directories

[robertbrignull]

In #2455 I made assert-pure.ql cover all of /src/common except for /src/common/vscode but I didn't realise we also have directories like /src/common/logging/vscode. So in this PR I change the query to ignore all directories containing /vscode/ anywhere in their path, and not just /src/common/vscode.

Checklist

• CHANGELOG.md has been updated to incorporate all user visible changes made by this pull request.
• Issues have been created for any UI or other user-facing changes made by this pull request.
• [Maintainers only] If this pull request makes user-facing changes that require documentation changes, open a corresponding docs pull request in the github/codeql repo and add the ready-for-doc-review label there.

[robertbrignull]

This will fix two alerts we have:

• https://github.com/github/vscode-codeql/security/code-scanning/520
• https://github.com/github/vscode-codeql/security/code-scanning/519

[shati-patel]

Makes sense!