fix: refactor upload_process command into _logic function

[sentry]

The upload_process command in codecov_cli/commands/upload_process.py was not following the established pattern of delegating its core logic to a _logic function in the services directory. This led to an AttributeError when a test script (token2.py) attempted to mock.patch a non-existent upload_process_logic attribute.

This PR refactors the upload_process command:

1. Creates a new service module codecov_cli/services/upload_process/__init__.py.
2. Moves the core logic of the upload_process command into a new function upload_process_logic within this service module.
3. Updates the upload_process command to import and call upload_process_logic, passing the necessary arguments.

This change aligns upload_process with the architectural pattern used by other commands (e.g., upload_coverage) and resolves the AttributeError by making upload_process_logic available for patching.

Fixes CLI-GQ

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[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
723	1	722	1

View the full list of 1 ❄️ flaky test(s)

api.temp.calculator.test_calculator::test_divide

Flake rate in main: 100.00% (Passed 0 times, Failed 1726 times)

Stack Traces | 0.001s run time

def
                test_divide():
                > assert Calculator.divide(1, 2) == 0.5
                E assert 1.0 == 0.5
                E + where 1.0 = <function Calculator.divide at 0x104c9eb90>(1, 2)
                E + where <function Calculator.divide at 0x104c9eb90> = Calculator.divide
                .../temp/calculator/test_calculator.py:30: AssertionError

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