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]

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 ⚠️

Additional details and impacted files

@@            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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