jira: add none checks in a few places

[valentijnscholten]

[sc-11909]

[dryrunsecurity]

This pull request logs a JIRA API error response's "meta" object directly (in dojo/jira_link/helper.py lines 1183–1186), which may expose sensitive request or authentication-related details in logs and lead to information disclosure. Consider sanitizing or omitting the meta content before logging to avoid leaking sensitive data.

Potential Logging of Sensitive Information in dojo/jira_link/helper.py

Vulnerability	Potential Logging of Sensitive Information
Description	The code logs the 'meta' object directly from a JIRA API error response without sanitization. This 'meta' object could potentially contain sensitive information such as parts of the request, internal error details, or authentication-related data, which, if exposed in logs, could lead to information disclosure.

django-DefectDojo/dojo/jira_link/helper.py

Lines 1183 to 1186 in 774dc7e

	logger.exception("jira_meta for project: %s and url: %s meta: %s", jira_project.project_key if jira_project else "N/A", jira_url, json.dumps(meta, indent=4))
	log_jira_alert(e.text, find)
	return None

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All finding details can be found in the DryRun Security Dashboard.

[mtesauro]

Approved