aws-sdk-cpp: include dev output as header path hint

[jonringer]

Description of changes

This includes the dev output in the hints to find the aws/core/Aws.h header.

Before this change, you would likely need to pass AWS_CORE_HEADER_FILE explicitly.

This is especially useful when using the find_package(AWSSDK) workflow.

Usage of individual targets is still pretty painless as install(TARGETS respects the $out + $dev split we do.

Related upstream issue: aws/aws-sdk-cpp#2009

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 22.11 Release Notes (or backporting 22.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
  • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.

[r-burns]

Nice fix, LGTM

[jonringer]

Merging once green

[r-burns]

Ping, merge conflict but still LGTM otherwise

[jonringer]

rebased on master

[Artturin]

Wrong indentation in the cmake file, but indentation in those are just visual AFAIK

94-        "C:/AWSSDK/${AWSSDK_INSTALL_INCLUDEDIR}/aws/core"
95:    "/nix/store/ha5w42s778vvmr7liq5z4azjmwlx5c1h-aws-sdk-cpp-1.11.37-dev/include/aws/core"