[OPENMP]Fix PR45911: Data sharing and lambda capture.

Summary:
No need to generate inlined OpenMP region for variables captured in
lambdas or block decls, only for implicitly captured variables in the
OpenMP region.

Reviewers: jdoerfert

Subscribers: yaxunl, guansong, cfe-commits, caomhin

Tags: #clang

Differential Revision: https://reviews.llvm.org/D79966