Activity Infrastructure: Refactor the payloads and split the rules and creators

[CTMBNara]

Main goals:

• Provide convenient way to create flexible payloads.

// before: As the payload expands, we will need to add new classes/add behavior to several old ones.
PrivacyEnforcementServiceActivityInvocationPayload.of(
                ActivityInvocationPayloadImpl.of(ComponentType.BIDDER, bidder),
                geo != null ? geo.getCountry() : null,
                geo != null ? geo.getRegion() : null,
                Optional.ofNullable(bidRequest.getRegs())
                        .map(Regs::getExt)
                        .map(ExtRegs::getGpc)
                        .orElse(null))
                        
                        
// now: As the payload expands, we will need to add new builder method.
ActivityInvocationPayload.builder()
                .component(ComponentType.BIDDER, bidder)
                .geo(geo != null ? geo.getCountry() : null, geo != null ? geo.getRegion() : null)
                .gpc(Optional.ofNullable(bidRequest.getRegs())
                        .map(Regs::getExt)
                        .map(ExtRegs::getGpc)
                        .orElse(null))
                .build();

• Split the rules and rule creators. This will make future development easier.

[CTMBNara]

We can get rid of this invariant check. Instead of ActivityPayload.builder() we can implement ActivityPayload.forComponent(ComponentType componentType, String componentName)

[Compile-Ninja]

Discussed with team, we don't need this update for now