Add `timeKey` and `timeFormat` to the logfmt parser

[gg-kialo]

Is your feature request related to a problem? Please describe.

The logfmt parser in the fluentbit ClusterParser and Parser resources is lacking the ability to be customised like the other parsers. It's missing the ability to set the timeKey, timeFormat, and timeKeep properties.

For example:
The logfmt parser definition: https://github.com/fluent/fluent-operator/blob/8a954f81dc2e195bdae763a737ffc60b396e03b5/apis/fluentbit/v1alpha2/plugins/parser/logfmt_types.go
The json parser definition: https://github.com/fluent/fluent-operator/blob/8a954f81dc2e195bdae763a737ffc60b396e03b5/apis/fluentbit/v1alpha2/plugins/parser/json_types.go

Describe the solution you'd like

Add the timeKey, timeFormat, and timeKeep properties to the logfmt parser to be consistent with the other parsers.

Additional context

No response