ci: simplyify tag logic

- Remove pre_release input
- master branch builds are always set to latest (non pre-releases)
- Fixed title of Telegram CI messages and make them clearer

Signed-off-by: TheSillyOk <priv.ld@proton.me>

Author: TheSillyOk

.github/workflows/build_kernels.yml

@@ -3,11 +3,6 @@ name: Kernel Build
 on:
   workflow_dispatch:
     inputs:
-      pre_release:
-        description: 'Make it a prerelease?'
-        required: false
-        type: boolean
-        default: true
   workflow_call:
     inputs:
       scheduled:
@@ -271,10 +266,18 @@ jobs:
         id: release_vars
         run: |
           echo "date=$(date +"%d/%m/%Y")" >> $GITHUB_ENV
-          echo "tg_title=${{ github.event.inputs.scheduled == 'true' && 'A new scheduled build has been completed!' || 'A new kernel CI release has been completed!' }}" >> $GITHUB_ENV
           echo "run_url=${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}" >> $GITHUB_ENV
           echo "nightly_url=https://nightly.link/${{ github.repository }}/actions/runs/${{ github.run_id }}" >> $GITHUB_ENV
           
+          if [ -n "${{ inputs.scheduled_build }}" ]; then
+            title="A new scheduled build has been made. (SCHEDULED BUILD)"
+          elif [ ${{ github.ref_name == 'master' }} ]; then
+            title="A new tag release has been made. (STABLE BUILD)"
+          else
+            title="A new test build has been made. (TEST BUILD)"
+          fi
+          echo "tg_title=$title" >> $GITHUB_ENV
+
           KSUN_URL=$(git ls-remote https://github.com/KernelSU-Next/KernelSU-Next.git HEAD | awk '{print "https://github.com/KernelSU-Next/KernelSU-Next/commit/"$1}')
           RKSU_URL=$(git ls-remote https://github.com/rsuntk/KernelSU HEAD | awk '{print "https://github.com/rsuntk/KernelSU/commit/"$1}')
           echo "KSUN_URL=$KSUN_URL" >> $GITHUB_ENV
@@ -325,7 +328,7 @@ jobs:
             echo "repo_dir=$PWD" >> $GITHUB_ENV
 
             if [ "${{ github.ref_type }}" != "tag" ]; then
-              if [[ "${{ inputs.pre_release }}" != "false" || "${{ github.ref_name }}" != "master" ]]; then
+              if [[  "${{ github.ref_name }}" != "master" ]]; then
                 TAG=$(date +"%Y/%m/%d")-test
                 gh release delete "$TAG" -y || true
               else
@@ -362,7 +365,7 @@ jobs:
           tag_name: ${{ env.TAG }}
           name: ${{ env.date }}
           body_path: release_body.md
-          prerelease: ${{ github.ref_name != 'master' || inputs.pre_release != 'false' }}
+          prerelease: ${{ github.ref_name != 'master' }}
 
       - name: Upload Release Assets
         env: