[System] `process.env.whitelist` in agent template is malformed

[jen-huang]

I believe there is an issue with the agent handlebars template for the process.env.whitelist field, there isn't a key before printing the items:

integrations/packages/system/data_stream/process/agent/stream/stream.yml.hbs

Lines 7 to 12 in aed6e1c

	process.include_cpu_ticks: {{process.include_cpu_ticks}}
	{{#if process.env.whitelist}}
	{{#each process.env.whitelist}}
	- {{this}}
	{{/each}}
	{{/if}}

This is causing the agent yaml that Fleet generates to be malformed:

[elasticmachine]

Pinging @elastic/elastic-agent-data-plane (Team:Elastic-Agent-Data-Plane)

[cmacknz]

@fearful-symmetry I assume this should be trivial to fix?

[fearful-symmetry]

Yah, lemme take a look....

[fearful-symmetry]

fix here: #3522

[jlind23]

Fixed as Alex stated.