Remove sharedContextLock from glVertexAttrib{Divisor|Binding} With prior CLs all the functions used by glVertexAttribDivisor*, glVertexBindingDivisor and glVertexAttribBinding only access VertexArrayPrivate. This CL removes shared context lock from these APIs. Bug: b/433331119 Change-Id: Ib1632797c53d2cd7a31c21e93c0e69385c71a27f Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6814157 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Amirali Abdolrashidi <abdolrashidi@google.com> Commit-Queue: Charlie Lao <cclao@google.com>