Split up codeQLQueryHistory.openQuery command

[robertbrignull]

Splits up the codeQLQueryHistory.openQuery command so we don't use the same command from more than one location. This makes our telemetry better because we can tell how users are interaction with features. It's ok to rename these commands because they are not visible to users in the command palette.

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.