add more params to dapr pubsub subscription

[halegreen]

fix issue: OpenFunction/OpenFunction#329

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[wanjunlei]

Why not define the router, match, and priority directly into the input?

[halegreen]

Hi, I think it is more clear to group router, match, priority to the one struct PubSubRoutingRule, other than put them directly into the input

considering every prop. Uri, ComponentName, ComponentType, Metadata maybe different for different trigger,
of input in function context

type Input struct {
	Uri               string             `json:"uri,omitempty"`
	ComponentName     string             `json:"componentName"`
	ComponentType     string             `json:"componentType"`
	Metadata          map[string]string  `json:"metadata,omitempty"`
}

[halegreen]

@tpiperatgod @wrongerror hi , any suggestions on this pr?

[benjaminhuo]

See my comments in OpenFunction/OpenFunction#332

[halegreen]

See my comments in OpenFunction/OpenFunction#332

fixed it . please have a look.

[wanjunlei]

See my comments in OpenFunction/OpenFunction#332

fixed it . please have a look.

Please make sure this pr does not conflict with #66, they both set the route.

[benjaminhuo]

See my comments in OpenFunction/OpenFunction#332

fixed it . please have a look.

Looks like still not fixed OpenFunction/OpenFunction#332 (comment):