fix(*) add release tagging script

[jpeach]

Summary

Add a script to ensure that the release tag is an annotated tag that
contains a summary of commits since the previous release. The tag name
is required to match Go module semantic version numbering.

Full changelog

• Fix version tagging to work with Go modules.

Issues resolved

Fix #2073

Documentation

None.

Testing

$ ./tools/releases/make-release-tag.sh 1.1.6 v99.99.0
Created tag 'v99.99.0'
Testing whether tag 'v99.99.0' can be pushed
To github.com:kumahq/kuma.git
 * [new tag]           v99.99.0 -> v99.99.0
Run 'git push origin v99.99.0' to push the tag if you are happy.

$ git show v99.99.0
tag v99.99.0
Tagger: James Peach <james.peach@konghq.com>
Date:   Tue Jun 15 07:56:43 2021 +1000

Tag v99.99.0 release.

Austin Cawley-Edwards (6):
      chore(*) add Installation Method line item to issue template (#1661)
      chore(crds) upgrade to apiextensions.k8s.io/v1 (#1108)
      feat(mads) implement v1 API (#1753)
      fix(prometheus-sd) namespace source names for v1 API (#1896)
      feat(mads) add support for HTTP long polling (#2121)
      feat(mads) allow specifying fetch-timeout via query param (#2148)

Bart Smykla (42):
      chore(*) gui update (#1657)
      feat(ci/cd) wait for check before e2e/integration (#1690)
      feat(*) remove overwhelming logs when delete crds (#1744)
      feat(tests) add eks as a target for e2e tests (#1684)
      chore(*) new gui version (#1773)
...

[bartsmykla]

lgtm