Plugin publication: fix the channel selector (#444)

* Plugin publication: fix the channel selector

Before this patch, publisher was always using the channel corresponding
to the first number in the plugin version for release builds. This is
because by default, Kotlin's substringAfter will return the whole input
string if it's unable to find the needle.

* Bump org.gradle.toolchains.foojay-resolver-convention

Bumps org.gradle.toolchains.foojay-resolver-convention from 0.7.0 to 0.8.0.

---
updated-dependencies:
- dependency-name: org.gradle.toolchains.foojay-resolver-convention
  dependency-type: direct:production
  update-type: version-update:semver-minor

* Release workflow: remove Java (#443)

* Release workflow: remove Java

It is not required in this workflow anyway.

* CHANGELOG.md update

---------

Co-authored-by: Jakub Chrzanowski <jakub.chrzanowski@jetbrains.com>

* CHANGELOG.md update

---------

Co-authored-by: KotlinIsland <65446343+kotlinisland@users.noreply.github.com>
Co-authored-by: Jakub Chrzanowski <jakub.chrzanowski@jetbrains.com>

CHANGELOG.md

@@ -30,6 +30,10 @@
 - GitHub Actions: Remove the `Setup Java` step from the `releaseDraft` build step
 - Gradle - Removed Qodana Gradle Plugin configuration to rely on defaults
 
+### Fixed
+
+- Fixed calculation of the plugin publication channel
+
 ### Removed
 
 - GitHub Actions: Remove the `Setup Java` step from the `releaseDraft` build step