refactor: Bypass codemcp.main.codemcp in tests

[ezyang]

Stack from ghstack (oldest at bottom):

• refactor: add @mcp.tool decorators to subtool functions #297
• fix: Fix tests after refactoring to bypass codemcp.main.codemcp #296
• -> refactor: Bypass codemcp.main.codemcp in tests #295
• refactor: Line up argument names and function names #294
• refactor: Move the extraction into the tool calls #293
• fix: Move defaulting into functions #292
• Delete multi_entry; main entrypoint is going to become multi entry #291

We recently refactored all codemcp/tools to have uniform naming convention according to subtool. Now I want all testing code to bypass codemcp.main.codemcp and instead directly call the function in main. We mostly need to update call_tool_assert_success. For BC, let's not change the signature; instead, we'll lookup the correct module.function using the passed subtool argument, and otherwise call the function with the same kwargs that codemcp would have been called with (we also recently updated all of the subtools to have exactly the same kwargs). Make this change and then run tests.

74f6121  (Base revision)
44aa7b8  Refactor call_tool_assert_success to bypass codemcp.main.codemcp and directly call subtool functions
0420dfe  Refactor call_tool_assert_error to bypass codemcp.main.codemcp and directly call subtool functions
db323cc  Update get_chat_id to directly call init_project instead of codemcp.main.codemcp
370d10f  Snapshot before auto-test
2102f1f  Fix parameter name for init_project (using 'directory' instead of 'path')
395a8a9  Fix InitProject parameter handling to convert 'path' to 'directory'
addb355  Fix InitProject parameter handling in call_tool_assert_error
334373d  Fix RunCommand parameter handling in call_tool_assert_error
5503501  Fix RunCommand parameter handling in call_tool_assert_success
54063b6  Fix InitProject to ensure reuse_head_chat_id parameter is provided
HEAD     Fix InitProject to ensure reuse_head_chat_id parameter is provided in call_tool_assert_error

codemcp-id: 295-refactor-bypass-codemcp-main-codemcp-in-tests