Consider adding vector.dev as a supported aggregator

[pepov]

Vector (vector.dev) has some benefits (performance, VRL language) that could bring value to a logging infrastructure managed by the logging operator.

Things to consider:

• is there any existing operator that the logging operator could integrate with to avoid reinventing the wheel?
• is there someone (company or individual) who would pick up the task of adding support and maintaining it?
• do we want/need a major refactor to be able to add another provider to the aggregation layer? (most probably yes)