Merge BlockstreamResearch/secp256k1-zkp#363: Upstream PRs 1846, 1848, 1849

8479eafa57 musig: always clear out secret key in `secp256k1_musig_nonce_gen_counter` (Sebastian Falbesoner)
3cca6451a2 ci: Bump GCC snapshot major version to 17 (Hennadii Stepanov)
285cb788e9 ci: Replace `ilammy/msvc-dev-cmd` with manual MSVC setup (Hennadii Stepanov)

Pull request description:

  This PR has been created by a GitHub Actions workflow without human involvement.

  [bitcoin-core/secp256k1#1846]: ci: Replace `ilammy/msvc-dev-cmd` with manual MSVC setup
  [bitcoin-core/secp256k1#1848]: ci: Bump GCC snapshot major version to 17
  [bitcoin-core/secp256k1#1849]: musig: always clear out secret key in `secp256k1_musig_nonce_gen_counter`

  Tips:
   * Use `git show --remerge-diff <pr-branch>` to show the conflict resolution in the merge commit.
   * Use `git read-tree --reset -u <pr-branch>` to replay these resolutions during the conflict resolution stage when recreating the PR branch locally.
     Be aware that this may discard your index as well as the uncommitted changes and untracked files in your worktree.

ACKs for top commit:
  mllwchrry:
    ACK b11340b. This sync PR can be merged as-is.
  DarkWindman:
    ACK b11340b3ce

Tree-SHA512: 4b311e9bfa21f00b4780202c08af9d00380f5b3df40704641764d706cfc3408615b6206c7c82ca915b56c27a354bdf24680674269a28eefe7d4e93adc06cbaa5

.github/workflows/ci.yml

@@ -693,11 +693,10 @@ jobs:
     steps:
       - *CHECKOUT
 
-      - name: Add cl.exe to PATH
-        uses: ilammy/msvc-dev-cmd@v1
-
       - name: C++ (public headers)
+        shell: cmd
         run: |
+          call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat"
           cl.exe -c -WX -TP include/*.h
 
   cxx_fpermissive_debian: