Fix init_qc_report_wf connections when linc-qc and abcc-qc are disabled

[tsalo]

Closes #1310. Fixes init_qc_report_wf in the scenario where linc_qc and abcc_qc are disabled, and CIFTI processing is enabled.

Changes proposed in this pull request

• Add inputnode to workflow within init_qc_report_wf when it hasn't been connected already.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 78.96%. Comparing base (3c7e875) to head (882ebae). Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
xcp_d/workflows/bold/plotting.py	0.00%	1 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1314 +/- ## ========================================== - Coverage 78.98% 78.96% -0.03% ========================================== Files 59 59 Lines 7381 7383 +2 Branches 956 957 +1 ========================================== Hits 5830 5830 - Misses 1260 1261 +1 - Partials 291 292 +1 ```

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