update error handling when serializing data

[jlewitt1]

Looks like an edge case, but seeing this when trying to call an HTTP URL of a function on a cluster:

  File "/opt/conda/lib/python3.10/site-packages/runhouse/servers/http/http_server.py", line 99, in wrapper
    raise e
  File "/opt/conda/lib/python3.10/site-packages/runhouse/servers/http/http_server.py", line 95, in wrapper
    res = await func(*args, **kwargs)
  File "/opt/conda/lib/python3.10/site-packages/runhouse/servers/http/http_server.py", line 492, in get_call
    "error": serialize_data(e, serialization),
  File "/opt/conda/lib/python3.10/site-packages/runhouse/servers/http/http_utils.py", line 121, in serialize_data
    data["error"] = str(data["error"])
TypeError: 'TypeError' object is not subscriptable```

[sentry-io]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: runhouse/servers/http/http_utils.py

Function	Unhandled Issue
serialize_data	TypeError: 'TypeError' object is not subscriptable /{key}/{method_nam... Event Count: 3
serialize_data	ValueError: Invalid serialization type "None /{ke... Event Count: 1

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[jlewitt1]

• update error handling when serializing data #807 👈
• main

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