[lld] [llvm] [LLD][COFF] Add more variety of CET flags (PR #150761)

[via llvm-commits]

kkent030315 wrote:

@mstorsjo Thanks for the review for this one as well! I parted the llvm-readobj changes to #150967. In order to merge this PR it requires #150967 to get merged because of enum flags being added. Afterwards I can revert llvm-readobj changes in this PR and get the final review.

https://github.com/llvm/llvm-project/pull/150761