qgsmaterial: Fix removal of parameters when clipping is disabled

[ptitjano]

Description

Plane clipping uses two QParameters named
CLIP_PLANE_ARRAY_PARAMETER_NAME and
CLIP_PLANE_MAX_PLANE_PARAMETER_NAME. When clipping is disabled both
parameters need to be removed to prevent side effects on the shader
code. However, the loops which iterates through the parameters breaks
as soon one parameter is found. This means that the second parameter
is never removed.

This issue is fixed by removing the break condition. This way, both
parameters are always removed from the material.

The first commit is factored out from #61057 for backport.

[github-actions]

🪟 Windows Qt6 builds

Download Windows Qt6 builds of this PR for testing.
(Built from commit f00a644)

🪟 Windows builds

Download Windows builds of this PR for testing.
Debug symbols for this build are available here.
(Built from commit f00a644)

[qgis-bot]

The backport to queued_ltr_backports failed:

The process '/usr/bin/git' failed with exit code 1

stderr

error: could not apply ce697de56fa... testqgs3drendering: Disable opacity for the polygons clipping test
hint: After resolving the conflicts, mark them with
hint: "git add/rm <pathspec>", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".
hint: Disable this message with "git config set advice.mergeConflict false"

stdout

[backport-61135-to-queued_ltr_backports 58eec0d0594] qgsmaterial: Fix removal of parameters when clipping is disabled
 Author: Matej Bagar <matej.bagar@lutraconsulting.co.uk>
 Date: Fri Mar 21 15:27:27 2025 +0100
 1 file changed, 1 deletion(-)
[backport-61135-to-queued_ltr_backports b0429c837ca] testqgs3dmaterial: Add tests for clipping
 Author: Jean Felder <jean.felder@oslandia.com>
 Date: Fri Mar 21 17:42:47 2025 +0100
 2 files changed, 145 insertions(+)
Auto-merging tests/src/3d/testqgs3drendering.cpp
warning: Cannot merge binary files: tests/testdata/control_images/3d/expected_polygon3d_extrusion_clipping/expected_polygon3d_extrusion_clipping.png (HEAD vs. ce697de56fa (testqgs3drendering: Disable opacity for the polygons clipping test))
Auto-merging tests/testdata/control_images/3d/expected_polygon3d_extrusion_clipping/expected_polygon3d_extrusion_clipping.png
CONFLICT (content): Merge conflict in tests/testdata/control_images/3d/expected_polygon3d_extrusion_clipping/expected_polygon3d_extrusion_clipping.png

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-queued_ltr_backports queued_ltr_backports
# Navigate to the new working tree
cd .worktrees/backport-queued_ltr_backports
# Create a new branch
git switch --create backport-61135-to-queued_ltr_backports
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick b2c158d3aa19243435a74342ff610d8bf94fe10e,d1b62f478b9b386e6ad7b675fa10ad73d1261a4b,ce697de56faa5e0c77eca16cb76424d738d51af6,dc0ecc26387afeeb2abe2d37794c592b83573580,f00a644d51244daae50c478a43d0e3ef2d5d5f99
# Push it to GitHub
git push --set-upstream origin backport-61135-to-queued_ltr_backports
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-queued_ltr_backports

Then, create a pull request where the base branch is queued_ltr_backports and the compare/head branch is backport-61135-to-queued_ltr_backports.