Add code-only create/update command support and runtime validation

[Jaytee-fn]

This PR adds code-only create and update support for Fn CLI and the Oracle fn_go path.

It introduces:

• CLI flags and validation for code-only create/update flows
• support for direct archive and Object Storage source modes
• runtime config validation for 'function-update' and 'manual' modes
• model and Oracle shim mapping needed to submit code-only create/update requests
• lifecycle work-request handling in the Oracle shim for function create/update/delete operations

The change includes -

• code-only create/update flags
• source-type validation
• runtime config validation
• image/code-only exclusivity checks
• direct archive file loading into request payloads
• stronger runtime validation, including:
  • runtime exists
  • runtime is active
  • runtime-version belongs to runtime-name
  • runtime-version is active
  • handler format validation by runtime family

fn_go change - fnproject/fn_go#60

Validation Examples -

direct create-

fn create function
--code-only
--source-type direct
--source-file /path/to/archive.zip
--runtime-config-type function-update
--runtime-name python311.ol9
--handler hello_world.handler

Object storage create -

fn create function
--code-only
--source-type object-storage
--bucket-name
--namespace
--object-name
--runtime-config-type function-update
--runtime-name python311.ol9
--handler hello_world.handler

Manual runtime mode

fn create function
--code-only
--source-type direct
--source-file /path/to/archive.zip
--runtime-config-type manual
--runtime-name python311.ol9
--runtime-version-id
--handler hello_world.handler

Update

fn update function
--code-only
--source-type direct
--source-file /path/to/archive.zip
--runtime-config-type function-update
--runtime-name python311.ol9
--handler hello_world.handler