build: update to Qt 6.11.1

[HTRamsey]

Summary

Updates the Qt target to 6.11.1 and the supported minimum to 6.11.0.

Changes

• qt_version 6.10.3 → 6.11.1, qt_minimum_version 6.10.0 → 6.11.0 (.github/build-config.json).
• iOS deployment target 14.0 → 17.0 — Qt 6.11's minimum supported iOS is 17 (QT_SUPPORTED_MIN_IOS_VERSION in Qt's .cmake.conf); 14.0 is no longer functional. macOS stays 13.0, matching Qt's minimum. Updated both build-config.json and the cmake/presets/iOS.json preset.
• QGC_QT_DISABLE_DEPRECATED_UP_TO / QGC_QT_ENABLE_STRICT_MODE_UP_TO 0x060A00 → 0x060B00 to track the new floor.
• Sync GStreamer color-transfer mapping to Qt 6.11.1's QGstCaps::formatAndVideoInfo(): SMPTE240M → Gamma22 and GAMMA18 → BT709 (previously swapped relative to Qt). Updated the unit test and added the missing GAMMA18 assertion.
• Refreshed Qt-version references in comments (Y444 omission note, wayland plugin note).

Verification

• Cross-checked every API deprecated in Qt 6.11 against the codebase — none are used.
• Confirmed against local Qt 6.11.1 source: min macOS 13 (matches), min iOS 17, CMake floor 3.22 (QGC pins 3.25), Android Gradle 9.3.1 / AGP 9.0.0 / JDK 17 (already aligned).
• QVideoFrameFormat::PixelFormat still has no Format_YUV444* in 6.11.1, so the Y444 omission remains correct.

Note: the color-transfer change alters behavior for SMPTE240M/GAMMA18 content (both rare) to match Qt's own mapping.

[Copilot]

Pull request overview

Updates QGroundControl’s Qt baseline to the Qt 6.11 line (target 6.11.1, minimum 6.11.0) and aligns related build/runtime expectations (iOS deployment target and GStreamer ↔ Qt color-transfer mapping) so CI and multimedia behavior match upstream Qt 6.11.

Changes:

• Bumped Qt target/minimum versions and updated the project’s “disable deprecated / strict mode” cutoffs to 0x060B00.
• Raised the iOS deployment target to 17.0 to match Qt 6.11’s minimum supported iOS version (including the iOS CMake preset).
• Synced GStreamer color-transfer mapping/tests to Qt 6.11.1 behavior (SMPTE240M and GAMMA18 adjustments) and refreshed related comments.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
.github/build-config.json	Updates Qt target/min versions and iOS deployment target used by CI/tooling.
cmake/presets/iOS.json	Raises iOS deployment target in the iOS CMake preset to 17.0.
cmake/CustomOptions.cmake	Updates Qt deprecation/strict-mode cutoff hex values to Qt 6.11 (0x060B00).
cmake/install/Install.cmake	Refreshes Wayland plugin comment while keeping deployment plugin inclusion intact.
src/VideoManager/VideoReceiver/GStreamer/GstAppSinkAdapter.cc	Adjusts GStreamer→Qt transfer-function mapping to match Qt 6.11.1’s backend mapping.
src/VideoManager/VideoReceiver/GStreamer/gstqgc/gstqgcvideosinkbin.cc	Updates Y444/Qt version comment in caps documentation.
test/VideoManager/GStreamer/GStreamerTest.cc	Updates/extends unit tests for the revised transfer-function mapping and comment refresh.

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 30.24%. Comparing base (f29efd3) to head (75c29be).
⚠️ Report is 104 commits behind head on master.

Files with missing lines	Patch %	Lines
src/QGCApplication.cc	66.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #14552      +/-   ##
==========================================
+ Coverage   25.47%   30.24%   +4.77%     
==========================================
  Files         769      772       +3     
  Lines       65912    67022    +1110     
  Branches    30495    31135     +640     
==========================================
+ Hits        16788    20270    +3482     
+ Misses      37285    32970    -4315     
- Partials    11839    13782    +1943     

Flag	Coverage Δ
unittests	30.24% <75.00%> (+4.77%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/Utilities/Network/QGCNetworkHelper.h	12.50% <ø> (+12.50%)	⬆️
...nager/VideoReceiver/GStreamer/GstAppSinkAdapter.cc	32.95% <100.00%> (+0.53%)	⬆️
...eoReceiver/GStreamer/HwBuffers/GstHwVideoBuffer.cc	70.00% <ø> (ø)
...deoReceiver/GStreamer/gstqgc/gstqgcvideosinkbin.cc	38.46% <ø> (-0.64%)	⬇️
src/QGCApplication.cc	19.53% <66.66%> (-1.92%)	⬇️

... and 377 files with indirect coverage changes

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