feat: added option --sarif-file-output for snyk code test [NEBULA-157]

[patricia-v]

What this does

This PR adds support to the --sarif-file-output flag in snyk code test.
The commands snyk test and snyk iac test support this flag, while snyk code test only supports --sarif but not writing to a file directly.

Notes for the reviewer

Run snyk code test --sarif-file-output in a repository to generate a file with the sarif result. This can be used simultaneously with other flags like --sarif and --no-markdown.

More information

• Jira ticket NEBULA-157
• Zendesk ticket 15314
• Zendesk ticket 15028

[github-actions]

	Warnings
⚠️	Since the CLI is unifying on a standard and improved tooling, we're starting to migrate old-style imports and exports to ES6 ones. A file you've modified is using either module.exports or require(). If you can, please update them to ES6 import syntax and export syntax. Files found: test/jest/unit/snyk-code/snyk-code-test.spec.ts

Generated by 🚫 dangerJS against 06a8a8c

[ArturSnyk]

[nitpicking] since sarif is a JSON-based format, i would name the file to reflect that it is indeed a json file

Suggested change

	'sarif-file-output': 'test',
	'sarif-file-output': 'test.json',