Configuring query parameter from configuration using the Reactive REST Client

[cescoffier]

Description

This epic is about configuring per-class and per-method query parameters, with an annotation.
Values may come from the configuration.

[quarkus-bot]

/cc @michalszynkiewicz

[michalszynkiewicz]

We could introduce a @ClientQueryParam annotation for it.
Something like:

public @interface ClientQueryParam {
    String name();
    String value();
    boolean required() default false;
}

There's a chance we could reuse HeaderFiller for it.

[michalszynkiewicz]

CC @Sgitario

[geoand]

Not sure I get this. Can someone give an example of what we are looking for?

[cescoffier]

Yhe idea as far as I understand is to annotate a REST client method with the ClientQueryParam to add the specified params as query parameters to the call. We have the same kind of feature for headers, but not for query parameters.

[geoand]

Okay cool, I'll add it.

[geoand]

#29277 brings in this future