jetbrains: rework following the Emacs builder

This commit moves a lot of the heavy lifting out of callPackage and back
into regular import, following conventions from upstream Nixpkgs. It
allows for a clearer and less magic definition of new packages,
particularly by downstream, as well, by exposing the *Build package
callers in the attribute set.

pkgs/applications/editors/jetbrains/manual-common-packages.nix

@@ -0,0 +1,33 @@
+{ callPackage }:
+{
+  ideavim = callPackage
+    ({ commonBuild }: commonBuild {
+      pname = "IdeaVim";
+      version = "0.57";
+      pluginId = 164;
+      versionId = 85009;
+      sha256 = "1rwfwj0b0nwi7jxhzxk1r0xc190nf4i3b59i0zknpmgb4yc5clzw";
+    })
+    { };
+
+  checkstyle-idea = callPackage
+    ({ commonBuild }: commonBuild {
+      pname = "CheckStyle-IDEA";
+      version = "5.42.0";
+      pluginId = 1065;
+      versionId = 95757;
+      sha256 = "0sji3649n5zz84dlidqaklipq6vaiafxsvg0gzy3j59mvkz6dk14";
+    })
+    { };
+
+  google-java-format = callPackage
+    ({ commonBuild }: commonBuild rec {
+      pname = "google-java-format";
+      version = "1.7.0.4";
+      pluginId = 8527;
+      versionId = 83164;
+      sha256 = "1pmnn1ksiv44kdga53gi3psrm2sva4bqrxizagbr0if2n0rrvgii";
+      filename = "${pname}.zip";
+    })
+    { };
+}