ICU-22606 Create full release from CI - update icu4c

.github/workflows/icu4c.yml

@@ -23,6 +23,10 @@ on:
   workflow_dispatch:
     # To trigger the Env Test workflow manually, follow the instructions in
     # https://docs.github.com/en/actions/managing-workflow-runs/manually-running-a-workflow
+    inputs:
+      gitReleaseTag:
+        description: 'Release tag to upload to. Must start with "release-"'
+        type: string
 
 # For non-release branches (namely: PRs), only run CI on the most recent commit. Cancel
 # runs on previous commits mid-flight when new commits are pushed.
@@ -48,7 +52,7 @@ jobs:
           cd icu4c/source;
           ./runConfigureICU Linux --disable-renaming;
            # Fail if 'warning:' appears in doxygen's output, but ignore warnings from file Doxyfile.
-           # Regex note: (?! ... ) is a negative lookahead. Succeed if the pattern is not present. 
+           # Regex note: (?! ... ) is a negative lookahead. Succeed if the pattern is not present.
           set +o pipefail && make doc 2>&1 | tee doxygen.log && ( ! grep -P 'warning:(?! .* file .?Doxyfile)' doxygen.log )
 
   # gcc debug build.
@@ -316,13 +320,13 @@ jobs:
         run: |
           cd icu4c/source && ./runConfigureICU --enable-debug --disable-release Linux/clang && make -j -l4.5 check
 
-  # Clang Linux 18 with CPP20 and treat warnings as errors 
+  # Clang Linux 18 with CPP20 and treat warnings as errors
   clang18-cpp20-warning-as-errors:
       runs-on: ubuntu-latest
       strategy:
         fail-fast: false
         matrix:
-          flags: 
+          flags:
             - '-std=c++20'
             - '-std=c++20 -stdlib=libc++'
       steps:
@@ -360,7 +364,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        include: 
+        include:
           - test_flags: 'x64 Debug'
             build_flags: '/p:Configuration=Debug /p:Platform=x64'
           - test_flags: 'x86 Debug'
@@ -405,11 +409,13 @@ jobs:
   # Windows MSVC distribution release
   windows-msvc-dist-release:
     runs-on: windows-latest
+    permissions:
+      contents: write # So that we can upload to release
     timeout-minutes: 30
     strategy:
       fail-fast: false
       matrix:
-        include: 
+        include:
           - arch: 'x64'
             plat: 'x64'
             win_ver: 'Win64'
@@ -465,6 +471,12 @@ jobs:
       with:
         name: icu4c.${{ matrix.win_ver }}.run_#${{ github.run_number }}
         path: icu4c/source/dist/${{ env.newZipName }}.zip
+    - name: Upload to release
+      if: ${{ inputs.gitReleaseTag && startsWith(inputs.gitReleaseTag, 'release-') }}
+      run: |
+        gh release upload ${{ inputs.gitReleaseTag }} icu4c/source/dist/${{ env.newZipName }}.zip --clobber
+      env:
+        GH_TOKEN: ${{ github.token }}
 
   # Window MSYS2 tests
   windows-msys2-gcc-x86_64:
@@ -481,9 +493,9 @@ jobs:
       with:
         update: true
         msystem: mingw64
-        install: > 
-          base-devel 
-          mingw-w64-x86_64-toolchain 
+        install: >
+          base-devel
+          mingw-w64-x86_64-toolchain
           make
     - name: 'Verify MinGW Installation'
       run: gcc --version
@@ -824,7 +836,7 @@ jobs:
         run: |
           cd icu4c/source
           make -j -l4.5 check
-  
+
   # https://unicode-org.github.io/icu/processes/release/tasks/healthy-code.html#test-uconfig_no_conversion
   icu4c-uconfig-no-conversion:
     runs-on: ubuntu-latest
@@ -848,6 +860,8 @@ jobs:
   # Workflow for ICU Export Data for ICU4X
   icu4c-icuexportdata:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write # So that we can upload to release
     timeout-minutes: 30
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
@@ -910,9 +924,15 @@ jobs:
       - name: Zip
         run: |
           cd icu4c/source/icuexportdata
-          zip -r ../../../icuexportdata_tag-goes-here.zip .
+          zip -r ../../../icuexportdata_${{ inputs.gitReleaseTag }}.zip .
       - name: Publish Artifact
         uses: actions/upload-artifact@v4
         with:
           name: icuexportdata_output
-          path: icuexportdata_tag-goes-here.zip
+          path: icuexportdata_*.zip
+      - name: Upload to release
+        if: ${{ inputs.gitReleaseTag && startsWith(inputs.gitReleaseTag, 'release-') }}
+        run: |
+          gh release upload ${{ inputs.gitReleaseTag }} icuexportdata_*.zip --clobber
+        env:
+          GH_TOKEN: ${{ github.token }}