Allow MEGALINTER_CONFIG to contain a full path to a MegaLinter config file

[nvuillam]

Fixes #2643

[nvuillam]

🦙 MegaLinter status: ⚠️ WARNING

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ BASH	bash-exec	6		0	0.04s
✅ BASH	shellcheck	6		0	0.19s
✅ BASH	shfmt	6	0	0	0.38s
✅ COPYPASTE	jscpd	yes		no	5.13s
✅ DOCKERFILE	hadolint	116		0	25.27s
✅ JSON	eslint-plugin-jsonc	23	0	0	3.13s
✅ JSON	jsonlint	21		0	0.29s
✅ JSON	v8r	23		0	20.79s
⚠️ MARKDOWN	markdownlint	310	0	229	214.85s
✅ MARKDOWN	markdown-link-check	310		0	7.87s
✅ MARKDOWN	markdown-table-formatter	310	0	0	26.24s
✅ OPENAPI	spectral	1		0	2.02s
⚠️ PYTHON	bandit	188		58	3.3s
✅ PYTHON	black	188	0	0	6.9s
✅ PYTHON	flake8	188		0	2.93s
✅ PYTHON	isort	188	0	0	0.96s
✅ PYTHON	mypy	188		0	12.58s
✅ PYTHON	pylint	188		0	19.18s
⚠️ PYTHON	pyright	188		301	32.92s
✅ PYTHON	ruff	188	0	0	0.62s
✅ REPOSITORY	checkov	yes		no	47.9s
✅ REPOSITORY	git_diff	yes		no	0.35s
✅ REPOSITORY	secretlint	yes		no	21.04s
✅ REPOSITORY	trivy	yes		no	37.97s
✅ SPELL	cspell	613		0	39.68s
⚠️ SPELL	vale	220		62	43.66s
✅ XML	xmllint	3	0	0	0.36s
✅ YAML	prettier	156	0	0	6.56s
✅ YAML	v8r	98		0	184.62s
✅ YAML	yamllint	157		0	2.21s

See detailed report in MegaLinter reports

MegaLinter is graciously provided by

[nvuillam]

🦙 MegaLinter status: ⚠️ WARNING

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ BASH	bash-exec	6		0	0.02s
✅ BASH	shellcheck	6		0	0.18s
✅ BASH	shfmt	6	0	0	0.05s
✅ COPYPASTE	jscpd	yes		no	4.6s
✅ DOCKERFILE	hadolint	116		0	20.58s
✅ JSON	eslint-plugin-jsonc	23	0	0	2.41s
✅ JSON	jsonlint	21		0	0.25s
✅ JSON	npm-package-json-lint	yes		no	0.83s
✅ JSON	v8r	23		0	19.02s
⚠️ MARKDOWN	markdownlint	310	2	229	187.26s
✅ MARKDOWN	markdown-link-check	310		0	7.87s
✅ MARKDOWN	markdown-table-formatter	310	2	0	24.93s
✅ OPENAPI	spectral	1		0	1.56s
⚠️ PYTHON	bandit	188		58	2.71s
✅ PYTHON	black	188	0	0	5.37s
✅ PYTHON	flake8	188		0	2.62s
✅ PYTHON	isort	188	0	0	0.67s
✅ PYTHON	mypy	188		0	10.23s
✅ PYTHON	pylint	188		0	16.28s
⚠️ PYTHON	pyright	188		301	26.89s
✅ PYTHON	ruff	188	0	0	0.14s
✅ REPOSITORY	checkov	yes		no	40.9s
⚠️ REPOSITORY	devskim	yes		913	6.15s
✅ REPOSITORY	dustilock	yes		no	2.5s
✅ REPOSITORY	git_diff	yes		no	0.04s
✅ REPOSITORY	secretlint	yes		no	17.8s
✅ REPOSITORY	syft	yes		no	1.28s
✅ REPOSITORY	trivy	yes		no	34.07s
✅ SPELL	cspell	626		0	30.2s
⚠️ SPELL	vale	220		62	37.26s
✅ XML	xmllint	3	0	0	0.03s
✅ YAML	prettier	156	0	0	5.14s
✅ YAML	v8r	98		0	160.42s
✅ YAML	yamllint	157		0	1.83s

See detailed report in MegaLinter reports

MegaLinter is graciously provided by