[feature] ClientInitialization/ParamAlias Implementation

[chunyu3]

Is it possible to move parameters that persist on each operation to the client instead with a decorator of some sort? In EventGrid this shows up in the case of

client()
publish(topic_name, events)
receive(topic_name, subscription_name, max_events)
ack(topic_name, subscription_name, lock_tokens)

to

client(topic_name, subscription_name)
publish(events)
receive(max_events)
ack(lock_tokens)

tcgc will introduce a decorator @clientInitialization to bump a operation parameter to client level, Azure/typespec-azure#914

.NET codegen will adopt the bump information to generate the client with the bumped parameter, methods will not take this parameter in signature.
When the client is sub-client, the bumped parameter will be the parameter in the GetAccossor method in parent client
e.g.
parent.GetSubClient(topic_name)

[chunyu3]

see detail in Azure/autorest.csharp#5131