Set r-devel-gcc as the default container (#5861)

* set r-devel-gcc as the default container

* Use shared .Rprofile

Author: MichaelChirico

…vcontainer/r-devel-clang-ubsan/.Rprofile .devcontainer/.Rprofile.devcontainer/r-devel-clang-ubsan/.Rprofile renamed to .devcontainer/.Rprofile .devcontainer/r-devel-clang-ubsan/.Rprofile renamed to .devcontainer/.Rprofile

@@ -1,5 +1,5 @@
 {
-  "build": { "dockerfile": "Dockerfile", "context": "../.." },
+  "build": { "dockerfile": "r-devel-gcc/Dockerfile", "context": ".." },
   "customizations": { "vscode": {
      "extensions": [
       "REditorSupport.r",

…vcontainer/r-devel-gcc/devcontainer.json .devcontainer/devcontainer.json.devcontainer/r-devel-gcc/devcontainer.json renamed to .devcontainer/devcontainer.json .devcontainer/r-devel-gcc/devcontainer.json renamed to .devcontainer/devcontainer.json

@@ -16,7 +16,7 @@ read.dcf("DESCRIPTION", c("Imports", "Suggests")) |>      \
 
 # setup cc()
 WORKDIR /root
-COPY .devcontainer/r-devel-clang-ubsan/.Rprofile .
+COPY .devcontainer/.Rprofile .
 
 # set ubsan flags
 WORKDIR .R

.devcontainer/r-devel-clang-ubsan/Dockerfile

@@ -15,4 +15,4 @@ read.dcf("DESCRIPTION", c("Imports", "Suggests")) |>      \
 
 # setup cc()
 WORKDIR /root
-COPY .devcontainer/r-devel-gcc/.Rprofile .
+COPY .devcontainer/.Rprofile .