Add extension string and flag to all renderers that pass
Modify eglCreateContext to accept EGL_NO_CONFIG
Modify eglQueryContext per specification
Modify eglMakeCurrent to bypass surface-context config compatibility checks
Add check for client API
Create new end2end test EGLNoConfigContextTest
Disable on most renderers to prevent possible fail with future configs

Bug: angleproject:3635
Test: dEQP-EGL.functional.create_context.no_config*
      angle_end2end_tests --gtest_filter=EGLNoConfigContextTest*
Change-Id: I7fbb137f1222ae7eebff4192013b7d3c5fcf0436
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1762709
Commit-Queue: Mohan Maiya <m.maiya@samsung.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>