[7.x] [ts/type_check] use less concurrency, give x-pack more memory (e…

…lastic#39419) (elastic#39449)

* [ts/typeCheck] limit concurrency based on CPU count

* [ts/typeCheck] increase memory limit for x-pack type check

* avoid fractional concurrency value

* run typescript script 80 times

* Revert "run typescript script 80 times"

This reverts commit 32bf59b.

src/dev/typescript/exec_in_projects.ts

@@ -17,6 +17,8 @@
  * under the License.
  */
 
+import os from 'os';
+
 import { ToolingLog } from '@kbn/dev-utils';
 import chalk from 'chalk';
 import execa from 'execa';
@@ -47,7 +49,7 @@ export function execInProjects(
       title: project.name,
     })),
     {
-      concurrent: true,
+      concurrent: Math.min(4, Math.round((os.cpus() || []).length / 2) || 1) || false,
       exitOnError: false,
     }
   );

src/dev/typescript/run_type_check_cli.ts

@@ -87,5 +87,10 @@ export function runTypeCheckCli() {
     process.exit(1);
   }
 
-  execInProjects(log, projects, 'tsc', project => ['--project', project.tsConfigPath, ...tscArgs]);
+  execInProjects(log, projects, process.execPath, project => [
+    ...(project.name === 'x-pack' ? ['--max-old-space-size=2048'] : []),
+    require.resolve('typescript/bin/tsc'),
+    ...['--project', project.tsConfigPath],
+    ...tscArgs,
+  ]);
 }