Enforce consistency of gl providers (#44307)

* glew: rework dependency on gl

This simplifies the package and ensures a single gl implementation is
pulled in. Before we were adding direct dependencies, and those are
not unified through the virtual.

* mesa-demos: rework dependency on gl

This simplifies the package and ensures a single gl implementation is
pulled in. Before we were adding direct dependencies, and those are
not unified through the virtual.

* mesa-glu: rework dependency on gl

This simplifies the package and ensures a single gl implementation is
pulled in. Before we were adding direct dependencies, and those are
not unified through the virtual.

* paraview: fix dependency on glew

* mesa: group dependency on when("+glx")

* Add missing dependency on libxml2

* paraview: remove the "osmesa" and "egl" variant

Instead, enforce consistency using the "gl" virtual that allows
only one provider.

* visit: remove osmesa variant

* Disable paraview in the aws-isc stacks

* data-vis-sdk: rework constrains to enforce front-ends

* e4s-power: remove redundant paraview

* Pipelines: update osmesa variants

* trilinos-catalyst-ioss-adapter: make gl a run dependency

share/spack/gitlab/cloud_pipelines/stacks/aws-isc-aarch64/spack.yaml

@@ -79,7 +79,7 @@ spack:
     - openfoam
     - osu-micro-benchmarks
     - parallel
-    - paraview
+    # - paraview
     - picard
     - quantum-espresso
     - raja

share/spack/gitlab/cloud_pipelines/stacks/aws-isc/spack.yaml

@@ -85,7 +85,7 @@ spack:
     - openfoam
     - osu-micro-benchmarks
     - parallel
-    - paraview
+    # - paraview
     - picard
     - quantum-espresso
 # Build broken for gcc@7.3.1 x86_64_v4 (error: '_mm512_loadu_epi32' was not declared in this scope)

share/spack/gitlab/cloud_pipelines/stacks/data-vis-sdk/spack.yaml

@@ -25,16 +25,16 @@ spack:
   - paraview_specs:
     - matrix:
       - - paraview +raytracing
-      - - +qt~osmesa # GUI Support w/ GLX Rendering
-        - ~qt~osmesa # GLX Rendering
-        - ~qt+osmesa # OSMesa Rendering
+      - - +qt ^[virtuals=gl] glx # GUI Support w/ GLX Rendering
+        - ~qt ^[virtuals=gl] glx # GLX Rendering
+        - ^[virtuals=gl] osmesa # OSMesa Rendering
   - visit_specs:
     - matrix:
-      - - visit
-      - - ~gui~osmesa # GLX Rendering
-        - ~gui+osmesa # OSMesa Rendering
+      - - visit~gui
+      - - ^[virtuals=gl] glx # GLX Rendering
+        - ^[virtuals=gl] osmesa # OSMesa Rendering
         # VisIt GUI does not work with Qt 5.14.2
-        # - +gui~osmesa # GUI Support w/ GLX Rendering
+        # - +gui ^[virtuals=gl] glx # GUI Support w/ GLX Rendering
   - sdk_base_spec:
     - matrix:
       - - ecp-data-vis-sdk +ascent +adios2 +cinema +darshan +faodel +hdf5 +pnetcdf

share/spack/gitlab/cloud_pipelines/stacks/e4s-cray-rhel/spack.yaml

@@ -50,7 +50,7 @@ spack:
       variants: +termlib
     paraview:
       # Don't build GUI support or GLX rendering for HPC/container deployments
-      require: "@5.11 ~qt+osmesa"
+      require: "@5.11 ~qt ^[virtuals=gl] osmesa"
     python:
       version: [3.8.13]
     trilinos:

share/spack/gitlab/cloud_pipelines/stacks/e4s-cray-sles/spack.yaml

@@ -43,7 +43,7 @@ spack:
       variants: +termlib
     paraview:
       # Don't build GUI support or GLX rendering for HPC/container deployments
-      require: "@5.11 ~qt+osmesa"
+      require: "@5.11 ~qt ^[virtuals=gl] osmesa"
     python:
       version: [3.8.13]
     trilinos:

share/spack/gitlab/cloud_pipelines/stacks/e4s-power/spack.yaml

@@ -168,7 +168,6 @@ spack:
   - hdf5
   - libcatalyst
   - parallel-netcdf
-  - paraview
   - py-cinemasci
   - sz
   - unifyfs

share/spack/gitlab/cloud_pipelines/stacks/e4s-rocm-external/spack.yaml

@@ -21,7 +21,7 @@ spack:
       variants: threads=openmp
     paraview:
       # Don't build GUI support or GLX rendering for HPC/container deployments
-      require: "@5.11 ~qt+osmesa"
+      require: "@5.11 ~qt ^[virtuals=gl] osmesa"
 
     # ROCm 5.4.3
     comgr:

share/spack/gitlab/cloud_pipelines/stacks/e4s/spack.yaml

@@ -52,7 +52,7 @@ spack:
       version: [11.8.0]
     paraview:
       # Don't build GUI support or GLX rendering for HPC/container deployments
-      require: "@5.11 ~qt+osmesa"
+      require: "@5.11 ~qt ^[virtuals=gl] osmesa"
 
   specs:
   # CPU

share/spack/gitlab/cloud_pipelines/stacks/gpu-tests/spack.yaml

@@ -31,7 +31,7 @@ spack:
       variants: threads=openmp
     paraview:
       # Don't build GUI support or GLX rendering for HPC/container deployments
-      require: "@5.11 ~qt+osmesa"
+      require: "@5.11 ~qt ^[virtuals=gl] osmesa"
     trilinos:
       require: +amesos +amesos2 +anasazi +aztec +boost +epetra +epetraext
         +ifpack +intrepid +intrepid2 +isorropia +kokkos +ml +minitensor +muelu