GHA: Clean up tag workflow (#5246)

Task/Issue URL: https://app.asana.com/0/488551667048375/1208707081604791

### Description

### Steps to test this PR
https://github.com/duckduckgo/Android/actions/runs/11706637463

Author: malmstein

.github/workflows/release_create_tag.yml

@@ -10,6 +10,7 @@ on:
 
 env:
   ASANA_PAT: ${{ secrets.GH_ASANA_SECRET }}
+  GH_TOKEN: ${{ secrets.GT_DAXMOBILE }}
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -33,11 +34,6 @@ jobs:
           ruby-version: 2.7.2
           bundler-cache: true
 
-      - name: Set Git permissions
-        uses: oleksiyrudenko/gha-git-credentials@v2-latest
-        with:
-          token: '${{ secrets.GT_DAXMOBILE }}'
-
       - name: Use fastlane lane to create and push tagged release
         id: create_git_tag
         run: |

fastlane/Fastfile

@@ -261,13 +261,11 @@ platform :android do
         # Checkout all branches are available
         sh("git fetch")
         sh("git checkout main")
-        sh("git branch")
         sh("git submodule update --init --recursive")
         sh("git reset --hard")
         sh("git clean -f -fxd")
 
         sh("git checkout develop")
-        sh("git branch")
         sh("git submodule update --init --recursive")
         sh("git reset --hard")
         sh("git clean -f -fxd")
@@ -287,7 +285,6 @@ platform :android do
 
         # Merge release branch into main and tag it
         sh "git checkout main"
-        sh "git pull origin main"
         sh "git merge --no-ff release/#{app_version}"
         sh "git tag -a #{app_version} -m #{app_version}"
         sh "git push origin main --tags"