Fix SPELL_VALE_CONFIG_FILE not working

[nvuillam]

Co-authored-by: Sam Chorlton 10245822+schorlton@users.noreply.github.com
(handle the override of linter CONFIG_FILE if the linter is activated only if some files are found)

Fixes #3403

[github-actions]

🦙 MegaLinter status: ⚠️ WARNING

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ BASH	bash-exec	5		0	0.06s
✅ BASH	shellcheck	5		0	0.36s
✅ BASH	shfmt	5	0	0	0.68s
✅ COPYPASTE	jscpd	yes		no	4.77s
✅ DOCKERFILE	hadolint	127		0	17.45s
✅ JSON	eslint-plugin-jsonc	21	0	0	5.42s
✅ JSON	jsonlint	19		0	0.3s
✅ JSON	v8r	21		0	26.83s
✅ MAKEFILE	checkmake	1		0	0.01s
⚠️ MARKDOWN	markdownlint	261	0	265	34.03s
✅ MARKDOWN	markdown-link-check	261		0	11.49s
✅ MARKDOWN	markdown-table-formatter	261	0	0	143.71s
✅ OPENAPI	spectral	1		0	1.42s
⚠️ PYTHON	bandit	208		64	4.73s
✅ PYTHON	black	208	0	0	5.77s
✅ PYTHON	flake8	208		0	1.82s
✅ PYTHON	isort	208	0	0	1.23s
✅ PYTHON	mypy	208		0	18.0s
✅ PYTHON	pylint	208		0	17.13s
⚠️ PYTHON	pyright	208		353	26.78s
✅ PYTHON	ruff	208	0	0	0.72s
✅ REPOSITORY	checkov	yes		no	43.21s
✅ REPOSITORY	git_diff	yes		no	0.61s
⚠️ REPOSITORY	grype	yes		1	23.85s
✅ REPOSITORY	secretlint	yes		no	18.34s
✅ REPOSITORY	trivy	yes		no	27.47s
✅ REPOSITORY	trivy-sbom	yes		no	10.13s
⚠️ REPOSITORY	trufflehog	yes		1	15.8s
✅ SPELL	cspell	683		0	28.31s
✅ SPELL	lychee	341		0	5.26s
✅ XML	xmllint	3	0	0	0.6s
✅ YAML	prettier	160	0	0	6.36s
✅ YAML	v8r	102		0	178.93s
✅ YAML	yamllint	161		0	2.3s

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