fix(@angular/cli): during an update only use package manager force option with npm 7+

The package manager `--force` option is only relevant to npm 7+ wherein the option controls
the strictness of the npm 7+ peer dependency resolution. Yarn 2+ does not support a `--force`
option. When the `ng update` `--force` option was used, `ng update` was incorrectly
applying the package manager `--force` option to Yarn which lead to an installation failure.
This has now been corrected and the package manager `--force` option is now only applied to npm 7+.

(cherry picked from commit 7ddc3fe)

Author: clydin

packages/angular/cli/src/commands/update/cli.ts

@@ -686,7 +686,7 @@ export class UpdateCommandModule extends CommandModule<UpdateCommandArgs> {
         });
       } catch {}
 
-      let forceInstall = options.force;
+      let forceInstall = false;
       // npm 7+ can fail due to it incorrectly resolving peer dependencies that have valid SemVer
       // ranges during an update. Update will set correct versions of dependencies within the
       // package.json file. The force option is set to workaround these errors.