Pull request: reduce-build-parallelism

Merge in DNS/adguard-home from reduce-build-parallelism to master

Squashed commit of the following:

commit 3c26331185f8402441334078eb73ad2615edd5e5
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Wed Jan 11 14:40:46 2023 +0300

    all: reduce build parallelism

bamboo-specs/release.yaml

@@ -109,7 +109,8 @@
                 CHANNEL=${bamboo.channel}\
                 GPG_KEY_PASSPHRASE=${bamboo.gpgPassword}\
                 FRONTEND_PREBUILT=1\
-                VERBOSE=1\
+                PARALLELISM=1\
+                VERBOSE=2\
                 build-release
   # TODO(a.garipov): Use more fine-grained artifact rules.
   'artifacts':