[Collections] Support multiple cert pinning configs per domain

[yim-lee]

No description provided.

[yim-lee]

@swift-ci please smoke test

[yim-lee]

@swift-ci please smoke test macOS

[tomerd]

@swift-ci please smoke test macOS

[tomerd]

23:21:40 Undefined symbols for architecture x86_64:
23:21:40   "swift::swift51override_conformsToSwiftProtocol(swift::TargetMetadata<swift::InProcess> const*, swift::TargetProtocolDescriptor<swift::InProcess> const*, __swift::__runtime::llvm::StringRef, swift::TargetProtocolConformanceDescriptor<swift::InProcess> const* (*)(swift::TargetMetadata<swift::InProcess> const*, swift::TargetProtocolDescriptor<swift::InProcess> const*, __swift::__runtime::llvm::StringRef))", referenced from:
23:21:40       _Swift50Overrides in libswiftCompatibility50.a(Overrides.cpp.o)
23:21:40 ld: symbol(s) not found for architecture x86_64
23:21:40 
clang: error: linker command failed with exit code 1 (use -v to see invocation)

@shahmishal CI infra issues?

[shahmishal]

Can please share link to the failure?

[yim-lee]

@shahmishal https://ci.swift.org/job/swift-package-manager-PR-macos-smoke-test/3244/console

[shahmishal]

Sounds like it's flakiness, we should file a bug (bugs.swift.org).

[yim-lee]

@swift-ci please smoke test