Only run gdal_grid, gdal_rasterize tests on GDAL 3.7+

The inputs we use for these run tests have open options, and now
that we are respecting these and passing them to the GDAL command
we can't run these tests on the earlier GDAL versions which
didn't support open options.

The commands generated by the corresponding algorithms are already
well tested and still run on the earlier GDAL releases, it's just
the actual run test which will be skipped.

python/plugins/processing/tests/testdata/gdal_algorithm_raster_tests.yaml

@@ -198,6 +198,9 @@ tests:
 
   - algorithm: gdal:gridaverage
     name: Moving average interpolation (gdal_grid)
+    condition:
+      gdal:
+        at_least: 3070000
     params:
       ANGLE: 0.0
       DATA_TYPE: 5
@@ -218,6 +221,9 @@ tests:
 
   - algorithm: gdal:griddatametrics
     name: Data metrics interpolation (gdal_grid)
+    condition:
+      gdal:
+        at_least: 3070000
     params:
       ANGLE: 0.0
       DATA_TYPE: 5
@@ -239,6 +245,9 @@ tests:
 
   - algorithm: gdal:gridinversedistance
     name: Inverse distance to a power interpolation (gdal_grid)
+    condition:
+      gdal:
+        at_least: 3070000
     params:
       ANGLE: 0.0
       DATA_TYPE: 5
@@ -262,6 +271,9 @@ tests:
 
   - algorithm: gdal:gridinversedistancenearestneighbor
     name: Inverse distance to a power with nearest neighbor searching (gdal_grid)
+    condition:
+      gdal:
+        at_least: 3070000
     params:
       DATA_TYPE: 5
       INPUT:
@@ -283,6 +295,9 @@ tests:
 
   - algorithm: gdal:gridlinear
     name: Linear interpolation (gdal_grid)
+    condition:
+      gdal:
+        at_least: 3070000
     params:
       DATA_TYPE: 5
       INPUT:
@@ -302,6 +317,9 @@ tests:
 
   - algorithm: gdal:gridnearestneighbor
     name: Nearest neighbor interpolation (gdal_grid)
+    condition:
+      gdal:
+        at_least: 3070000
     params:
       ANGLE: 0.0
       DATA_TYPE: 5
@@ -357,6 +375,9 @@ tests:
 
   - algorithm: gdal:rasterize
     name: Test (gdal:rasterize)
+    condition:
+      gdal:
+        at_least: 3070000
     params:
       BURN: 0.0
       DATA_TYPE: 5
@@ -379,6 +400,9 @@ tests:
 
   - algorithm: gdal:rasterize
     name: Test extent crs (gdal:rasterize)
+    condition:
+      gdal:
+        at_least: 3070000
     params:
       BURN: 0.0
       DATA_TYPE: 5