tools: exclude deps/v8/tools from CodeQL scans

[Trott]

This will remove three of the four "A parse error occurred" issues during JavaScript CodeQL scans. (The fourth occurrence is in our code base, although it might be a false positive. Someone can figure that one out sooner or later, but we certainly can bypass scanning V8 tools.)

[Trott]

Test run of this change in my fork: https://github.com/Trott/io.js/actions/runs/14807712228

[Trott]

Test run of this change in my fork: https://github.com/Trott/io.js/actions/runs/14807712228

Confirmed that this eliminates three of the four parse errors, as expected.

[nodejs-github-bot]

Landed in c46b2b9da30628585900b53052aec509cb59036e