ci: add codeql workflow

[y-lakhdar]

Setup CodeQL
Source code here

[github-actions]

Dependency Review

The following issues were found:

• ✅ 0 vulnerable package(s)
• ✅ 0 package(s) with incompatible licenses
• ✅ 0 package(s) with invalid SPDX license definitions
• ⚠️ 1 package(s) with unknown licenses.

See the Details below.

License Issues

.github/workflows/codeql.yml

Package	Version	License	Issue Type
coveo/actions/.github/workflows/java-maven-openjdk11-codeql.yml	main	Null	Unknown License

Allowed Licenses: 0BSD, Apache-2.0, Apache-2.0 AND BSD-3-Clause AND Python-2.0, Beerware, BlueOak-1.0.0, BSD-1-Clause, BSD-2-Clause, BSD-2-Clause-Patent, BSD-2-Clause-Views, BSD-2-Clause AND MIT, BSD-3-Clause, BSD-3-Clause-Attribution, BSD-3-Clause-Clear, BSL-1.0, CC-BY-3.0, CC-BY-4.0, CC0-1.0, CNRI-Python, curl, HPND, IBM-pibs, ImageMagick, ISC, JSON, MIT, MIT-0, MIT AND Python-2.0, MIT-advertising, mpi-permissive, NCSA, ODC-By-1.0, PDDL-1.0, Plexus, PostgreSQL, PSF-2.0, Python-2.0, Python-2.0.1, SAX-PD, Unlicense, UPL-1.0, W3C, Wsuipa, WTFPL, X11, X11-distribute-modifications-variant, Xerox, Zlib, ZPL-2.1

Scanned Manifest Files

.github/workflows/codeql.yml

• coveo/actions/.github/workflows/java-maven-openjdk11-codeql.yml@main

[btaillon-coveo]

Looks fine, although I'm not sure why there's blank lines in-between the lines of codeql.yml.