github-ci: support the new version format

The new release policy suggests to use X.Y.Z-alphaN, X.Y.Z-betaN,
X.Y.Z-rcN tags for pre-releases. See the policy document here:
https://github.com/tarantool/tarantool/discussions/6182

This commit enforces the new versioning for tarantool builds that're
made from CI.

Tarballs
--------

When we'll add the 2.10.0-beta1 tag, the tarball will be named so:

> tarantool-2.10.0-beta1.tar.gz

When we'll add one commit upward the tag, the tarball will be named so:

> tarantool-2.10.0-beta1.1.dev.tar.gz

(In fact, we don't deploy tarballs per push anymore, so it is just for
the same of completeness.)

For 2.10.0 release it'll be named as:

> tarantool-2.10.0.tar.gz

How to try: `make -f .gitlab.mk source`.

Packages
--------

When we'll add the 2.10.0-beta1 tag, the packages for Ubuntu Focal will
be named so:

> tarantool_2.10.0~beta1-1_amd64.deb
> tarantool-common_2.10.0~beta1-1_all.deb
> tarantool-dev_2.10.0~beta1-1_amd64.deb

The sources packaged together with the package will be named so:

> tarantool_2.10.0~beta1-1.debian.tar.xz
> tarantool_2.10.0~beta1-1.dsc
> tarantool_2.10.0~beta1.orig.tar.xz
> tarantool-2.10.0~beta1.tar.xz

When we'll add one commit upward the tag, those files will look so:

> tarantool_2.10.0~beta1.1.dev-1_amd64.deb
> tarantool-common_2.10.0~beta1.1.dev-1_all.deb
> tarantool-dev_2.10.0~beta1.1.dev-1_amd64.deb

> tarantool_2.10.0~beta1.1.dev-1.debian.tar.xz
> tarantool_2.10.0~beta1.1.dev-1.dsc
> tarantool_2.10.0~beta1.1.dev.orig.tar.xz
> tarantool-2.10.0~beta1.1.dev.tar.xz

(In fact, we don't deploy packages per push anymore, so it is just for
the same of completeness.)

For 2.10.0 release it'll be named so:

> tarantool_2.10.0.gcb3bdbf2a-1_amd64.deb
> tarantool-common_2.10.0.gcb3bdbf2a-1_all.deb
> tarantool-dev_2.10.0.gcb3bdbf2a-1_amd64.deb

> tarantool_2.10.0.gcb3bdbf2a-1.debian.tar.xz
> tarantool_2.10.0.gcb3bdbf2a-1.dsc
> tarantool_2.10.0.gcb3bdbf2a.orig.tar.xz
> tarantool-2.10.0.tar.xz

How to try: `OS=ubuntu DIST=focal make -f .gitlab.mk package`.

Fixes #6184

.gitlab.mk

@@ -115,16 +115,24 @@ vms_shutdown:
 # ######
 
 GIT_DESCRIBE=$(shell git describe HEAD)
+GIT_TAG=$(shell git tag --points-at HEAD)
 MAJOR_VERSION=$(word 1,$(subst ., ,$(GIT_DESCRIBE)))
 BUCKET="series-$(MAJOR_VERSION)"
 S3_BUCKET_URL="s3://tarantool_repo/sources"
 
 deploy_prepare:
-	[ -d packpack ] || \
-		git clone https://github.com/packpack/packpack.git packpack
+	rm -rf packpack
+	git clone https://github.com/packpack/packpack.git packpack
+	(cd packpack && patch -p1 < ../extra/packpack-dont-decline-custom-version.patch)
 	rm -rf build
 
 package: deploy_prepare
+	if [ -n "$(GIT_TAG)" ]; then                                                                                    \
+		export VERSION="$$(echo $(GIT_TAG) | sed 's/-/~/')";                                                    \
+	else                                                                                                            \
+		export VERSION="$$(echo $(GIT_DESCRIBE) | sed 's/-\([0-9]\+\)-g[0-9a-f]\+$$/.\1/' | sed 's/-/~/').dev"; \
+	fi;                                                                                                             \
+	echo VERSION=$$VERSION;                                                                                         \
 	PACKPACK_EXTRA_DOCKER_RUN_PARAMS="--network=host ${PACKPACK_EXTRA_DOCKER_RUN_PARAMS}" ./packpack/packpack
 
 # found that libcreaterepo_c.so installed in local lib path
@@ -144,6 +152,12 @@ deploy:
 	esac
 
 source: deploy_prepare
+	if [ -n "$(GIT_TAG)" ]; then                                                                     \
+		export VERSION=$(GIT_TAG);                                                               \
+	else                                                                                             \
+		export VERSION="$$(echo $(GIT_DESCRIBE) | sed 's/-\([0-9]\+\)-g[0-9a-f]\+$$/.\1/').dev"; \
+	fi;                                                                                              \
+	echo VERSION=$$VERSION;                                                                          \
 	TARBALL_COMPRESSOR=gz packpack/packpack tarball
 
 source_deploy: source

extra/packpack-dont-decline-custom-version.patch

+diff --git a/pack/config.mk b/pack/config.mk
+index 2ceb36d..6f8dfaa 100644
+--- a/pack/config.mk
++++ b/pack/config.mk
+@@ -42,10 +42,12 @@ DESCRIBE := $(shell git describe --long --always)
+ # Sic: please follow Semantic Versioning (http://semver.org),
+ # Debian policies and Fedora guidelines then planning your releases.
+ #
+-VERSION ?= $(shell echo $(DESCRIBE) | sed -n 's/^\([0-9\.]*\)-\([0-9]*\)-\([a-z0-9]*\)/\1.\2/p')
++ifeq ($(VERSION),)
++VERSION = $(shell echo $(DESCRIBE) | sed -n 's/^\([0-9\.]*\)-\([0-9]*\)-\([a-z0-9]*\)/\1.\2/p')
+ ifeq ($(VERSION),) # Fallback
+ VERSION := 0.0.1
+ endif
++endif
+ 
+ # The number of times this version of the software has been packaged.
+ # This feature is not implemented yet, therefore value is always set to 1.