Publish API docs to /latest (#7301)

This PR adds publishing API docs for the latest sdk version to the
`ios/maps/api/latest`/`android/maps/api/latest` for iOS/Android.
Decision logic for doc publishing is encapsulated in
`.github/actions/docs/check-latest/action.yml` action.

For iOS I duplicated doc building step as there are version-specific
paths, we build one doc archive to be hosted under `/xx.xx.xx` path and
another for `/latest`.
For Android I didn't notice anything version-specific, so the same
artifact is uploaded both for `/xx.xx.xx` and `/latest` paths.

I also fixed iOS create docs PR script erroring out if the documentation
branch already exists(basically on rerun) by skipping PR creation in
this case.

Addresses: https://mapbox.atlassian.net/browse/MAPSSDK-832

Test runs:
New latest `11.999.999` -
https://github.com/mapbox/mapbox-sdk/actions/runs/18405591378
Patch `11.14.999` -
https://github.com/mapbox/mapbox-sdk/actions/runs/18405626406
Pre-release `11.17.999-beta.1` -
https://github.com/mapbox/mapbox-sdk/actions/runs/18405666478

cc @mapbox/maps-ios
cc @mapbox/sdk-ci

cc @mapbox/maps-android

---------

Co-authored-by: Ivan Persidskii <[email protected]>
GitOrigin-RevId: d2cde23743855fa384ab29cf11d6923e052373c9

Author: 2 people

scripts/release/create-docs-prs.sh

@@ -66,6 +66,12 @@ ios_sdk_update_versions() {
 
     IOS_SDK_BRANCH_NAME="maps-sdk/ios/${VERSION}"
 
+    # Check if branch already exists remotely
+    if git ls-remote --heads origin "$IOS_SDK_BRANCH_NAME" | grep -q "$IOS_SDK_BRANCH_NAME"; then
+        info "Branch $IOS_SDK_BRANCH_NAME already exists, skipping creating docs PR."
+        cleanup 0
+    fi
+
     git_configure_release_user
 
     git checkout -b "${IOS_SDK_BRANCH_NAME}" --quiet