fix: make empty-upload commit creation conditional

[sentry]

This PR addresses an AssertionError occurring in a test for the empty-upload command. The root cause was that the create_commit_logic function was unconditionally called within the empty-upload command, even when no explicit commit-related arguments (--parent-sha, --pr, --branch) were provided by the user.

The fix introduces a check to ensure that create_commit_logic is only invoked if the user has explicitly supplied one of these arguments via the command line or environment variables. Values derived from CI/versioning system fallbacks (e.g., automatically detected branch from git) will no longer trigger commit creation. This aligns the command's behavior with the expectations of the verification script and its original intent before commit #654.

Fixes CLI-HJ

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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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