test-compat-terra.R: relax regex for R-oldrel on macOS *

Following failure was seen in r-spatial.r-universe.dev, but not in
https://cran.r-project.org/web/checks/check_results_qgisprocess.html :

  ── Failure ('test-compat-terra.R:245:3'): terra argument coercers work for SpatVectorProxy ──
  as_qgis_argument\(obj, qgis_argument_spec\(qgis_type = "point"\)\) does not match "^[\\de\\+]+,[\\de\\+]+\\[\\w+:\\d+\\]$".
  Actual value: "7e\+05,7e\+05"
  Backtrace:
      ▆
   1. └─testthat::expect_match(...) at test-compat-terra.R:245:3
   2.   └─testthat:::expect_match_(...)

  [ FAIL 2 | WARN 6 | SKIP 59 | PASS 260 ]
  Error: Test failures
  Execution halted

This commit relaxes the regex match for qgis argument type 'point' in case of SpatVectorProxy, specifically in
R < 4.3 on macOS.

Notably, it appears that on macOS R-oldrel `terra::crs(x, describe = TRUE)[, c("authority", "code")]` does not
return the same as in other systems / R-releases; instead this result must have at least one NA value.

Author: florisvdh

tests/testthat/test-compat-terra.R

@@ -242,11 +242,19 @@ test_that("terra argument coercers work for SpatVectorProxy", {
     tmp_file
   )
   obj <- terra::vect(tmp_file, proxy = TRUE)
-  expect_match(
-    as_qgis_argument(obj, qgis_argument_spec(qgis_type = "point")),
-    "^[\\de\\+]+,[\\de\\+]+\\[\\w+:\\d+\\]$",
-    perl = TRUE
-  )
+  if (getRversion() < "4.3" && is_macos()) {
+    expect_match(
+      as_qgis_argument(obj, qgis_argument_spec(qgis_type = "point")),
+      "^[\\de\\+]+,[\\de\\+]+(?:\\[\\w+:\\d+\\])?$",
+      perl = TRUE
+    )
+  } else {
+    expect_match(
+      as_qgis_argument(obj, qgis_argument_spec(qgis_type = "point")),
+      "^[\\de\\+]+,[\\de\\+]+\\[\\w+:\\d+\\]$",
+      perl = TRUE
+    )
+  }
 })
 
 test_that("terra argument coercers work for a SpatVectorProxy referring to a layer in a multi-layer file", {