CLI-319: Add support for custom pickle type to parameterized functions

[kramstrom]

Describe your changes

Do not merge -- need to merge backend support before this.

• Adds support for new modal.parameter types other than int and str by adding a "catch-all" type that pickles whatever the user sends in.
• Renamed parametrized to parameterized across codebase

Usage:

@app.cls()
class C:
    a: typing.Annotated[list, modal.PickleSerialization] = modal.parameter(default=[1, 2, 3])

• Provide Linear issue reference (e.g. MOD-1234) if available.

Backward/forward compatibility checks

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Check these boxes or delete any item (or this section) if not relevant for this PR.

• Client+Server: this change is compatible with old servers
• Client forward compatibility: this change ensures client can accept data intended for later versions of itself

Note on protobuf: protobuf message changes in one place may have impact to
multiple entities (client, server, worker, database). See points above.

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Changelog

Adds support for custom types for parameterized functions.

Usage:

import typing
import modal

app = modal.App()


@app.cls()
class Foo:
    a: typing.Annotated[dict, modal.PickleSerialization] = modal.parameter()
    b: typing.Annotated[list, modal.PickleSerialization] = modal.parameter(default=[1, 2, 3])

    @modal.method()
    def bar(self):
        return f"hello {self.a}, {self.b}"


@app.local_entrypoint()
def main():
    foo = Foo(a={"foo": "bar"})
    foo.bar.remote()

For parameterized functions with web hooks you must provide a default value to any custom type parameter and these parameters cannot be overridden with web parameter inputs.