Add api version in ClientOptions and policy inside generated client

[qiaozha]

fixes Azure/azure-sdk-for-js#29883 and #2396 (comment) in favor of Azure/azure-sdk-for-js#29904

if there's no client level api version, we will:

1. not generate apiVersion in options
   which means we will not generate a property of apiVersion in the ServiceClientOptions interface.
2. remove ApiVersionPolicy
   which means, we will generate code client.pipeline.removePolicy({ name: "ApiVersionPolicy" }); after createClient from core-client-rest.
3. add log warning
   if there's no client level api version, we will add a warning
   logger.warning("This client does not support client api-version, please change it at the operation level");
   if there's client level api version, but it's required, and it doesn't have a default value, apiVersion will be a positional argument for client factory function. we will ignore api version passed in options, and add a warning
   logger.warning("This client does not support to set api-version in options, please change it at positional argument");
ApiVersionPolicy will also be removed in this case
4. not add client side ClientApiVersionPolicy
   if there's no client level api version, we don't need to add this policy here, but if there's client level api version in the query position, according to [Deprecate]: deprecate apiVersion in ClientOptions from core-client-rest azure-sdk-for-js#29883 (comment) we will generate a new ClientApiVersionPolicy in the client side, so that we can remove the ApiVersionPolicy from core-client-rest in the future.

	hasDefault: true  required: true	hasDefault: true required: false	hasDefault: false required: true	hasDefault: false required: false
Path	Required: false Generate ApiVersion in Options: true Remove ApiVersionPolicy: true Add clientApiVersionPolicy: false { apiVersion = "default", …options }	Required: false Generate ApiVersion in Options: true Remove ApiVersionPolicy: true Add clientApiVersionPolicy: false { apiVersion = "default", …options }	Required: true Generate ApiVersion in Options: false Remove ApiVersionPolicy: true Add clientApiVersionPolicy: false Options logWarning: true	Required: false Generate apiVersion in options: true Remove ApiVersionPolicy: true Add clientApiVersionPolicy: false { apiVersion, …options }
Query	Required: false Generate ApiVersion in Options: true Remove ApiVersionPolicy: true Add clientApiVersionPolicy: true { apiVersion = "default", …options }	Required: false Generate ApiVersion in Options: true Remove ApiVersionPolicy: true Add clientApiVersionPolicy: true { apiVersion = "default", …options }	Required: true Generate ApiVersion in Options: false Remove ApiVersionPolicy: true Add clientApiVersionPolicy: true Options logWarning: true	Required: false Generate apiVersion in options: true Remove apiVersionPolicy: true Add clientApiVersionPolicy: true { apiVersion, …options }

[joheredi]

Looks great, left a comment on how to avoid that createClient causes side effects, should be easy to address. Please consider taking the suggestion

[xirzec]

Looks good, just two minor remarks. 👍