[FIX] Change hipCT microscopy suffix to XPCT

[chourroutm]

Following the discussion at #1646, I am reverting @balbasty's PR #1686 with XPCT instead of hipCT: it is more suited for a broader audience.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.92%. Comparing base (3fd21ff) to head (f16bd8f).
Report is 316 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1822   +/-   ##
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  Coverage   87.92%   87.92%           
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  Files          16       16           
  Lines        1375     1375           
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  Hits         1209     1209           
  Misses        166      166           

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[effigies]

This appears to be the consensus on #1646, and it covers the necessary pieces. Could you make a PR to the BIDS validator to add XPCT suffixes in the following locations?

• https://github.com/bids-standard/bids-validator/blob/43a7117/bids-validator/bids_validator/rules/top_level_rules.json#L254-L276
• https://github.com/bids-standard/bids-validator/blob/43a7117/bids-validator/bids_validator/rules/session_level_rules.json#L227-L247
• https://github.com/bids-standard/bids-validator/blob/43a7117/bids-validator/bids_validator/rules/file_level_rules.json#L582-L600