FR TN Fixes

[zoobereq]

What does this PR do ?

• The % sign is now accepted by French TN (this issue). This is generally implemented as part of the Measures class, which French currently lacks. As a stop-gap measure, the % was whitelisted. It should be properly implemented as part of Measures.

Note: This fix was tested with pyTest only. It needs to be tested on Sparrowhawk as well. I was unable to do that since my hardware doesn't have enough memory.

This PR does not address the following:

• The issue with 2h not normalizing to deux heures in FR. Since the abbreviation h is subject to declension, this problem should be addressed with the implementation of the Measures class.

Before your PR is "Ready for review"

Pre checks:

• [x] Have you signed your commits? Use git commit -s to sign.
• [x] Do all unittests finish successfully before sending PR? 1) pytest or (if your machine does not have GPU) pytest --cpu from the root folder (given you marked your test cases accordingly @pytest.mark.run_only_on('CPU')). 2) Sparrowhawk tests bash tools/text_processing_deployment/export_grammars.sh --MODE=test ...
• [x] If you are adding a new feature: Have you added test cases for both pytest and Sparrowhawk here.
• [x] Have you added __init__.py for every folder and subfolder, including data folder which has .TSV files?
• [x] Have you followed codeQL results and removed unused variables and imports (report is at the bottom of the PR in github review box) ?
• [x] Have you added the correct license header Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved. to all newly added Python files?
• [x] If you copied nemo_text_processing/text_normalization/en/graph_utils.py your header's second line should be Copyright 2015 and onwards Google, Inc.. See an example here.
• [x] Remove import guards (try import: ... except: ...) if not already done.
• [x] If you added a new language or a new feature please update the NeMo documentation (lives in different repo).
• [x] Have you added your language support to tools/text_processing_deployment/pynini_export.py.

PR Type:

• [ ] New Feature
• [x] Bugfix
• [ ] Documentation
• [x] Test

If you haven't finished some of the above items you can still open "Draft" PR.

[zoobereq]

Both pyTests and Sparrowhawk tests passed.