Add Azure Pipelines instructions to Gitleaks linter

[bdovaz]

Fixes #4467

[github-actions]

🦙 MegaLinter status: ⚠️ WARNING

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ API	spectral	1		0	1.82s
⚠️ BASH	bash-exec	6		1	0.02s
✅ BASH	shellcheck	6		0	0.22s
✅ BASH	shfmt	6	0	0	0.92s
✅ COPYPASTE	jscpd	yes		no	3.48s
✅ DOCKERFILE	hadolint	129		0	25.03s
✅ JSON	jsonlint	20		0	0.27s
✅ JSON	v8r	22		0	15.6s
⚠️ MARKDOWN	markdownlint	267	0	301	27.64s
✅ MARKDOWN	markdown-table-formatter	267	0	0	161.3s
⚠️ PYTHON	bandit	214		66	3.79s
✅ PYTHON	black	214	0	0	4.6s
✅ PYTHON	flake8	214		0	2.4s
✅ PYTHON	isort	214	0	0	1.18s
✅ PYTHON	mypy	214		0	17.77s
✅ PYTHON	pylint	214		0	34.6s
✅ PYTHON	ruff	214	0	0	0.6s
✅ REPOSITORY	checkov	yes		no	36.77s
✅ REPOSITORY	git_diff	yes		no	0.75s
⚠️ REPOSITORY	grype	yes		26	12.34s
✅ REPOSITORY	secretlint	yes		no	11.3s
✅ REPOSITORY	trivy	yes		no	16.95s
✅ REPOSITORY	trivy-sbom	yes		no	0.32s
⚠️ REPOSITORY	trufflehog	yes		1	53.8s
✅ SPELL	cspell	717		0	14.46s
⚠️ SPELL	lychee	349		14	5.52s
✅ XML	xmllint	3	0	0	0.8s
✅ YAML	prettier	160	0	0	5.11s
✅ YAML	v8r	102		0	30.32s
✅ YAML	yamllint	161		0	3.05s

See detailed report in MegaLinter reports

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