Update to OpenSSL 3.

[teo-tsirpanis]

SC-36844

This PR removes the openssl vcpkg port overlay, which unpins OpenSSL from version 1.1.1.t to whichever is set in the vcpkg builtin-baseline (currently version 3.1.4).

Validated by successfully building the Core on WSL. No warnings or errors about deprecated APIs were emitted by the compiler, which means that this PR does not have to touch any first-party code.

---

TYPE: IMPROVEMENT
DESC: The version of OpenSSL linked to the release artifacts was updated to 3.1.4, and moving forward will be synced to the vcpkg builtin-baseline.

[eddelbuettel]

@teo-tsirpanis This looks like minor noise but why am I getting it?

-- Installing port from location: /home/edd/git/vcpkg/buildtrees/versioning_/versions/openssl/5ee74387a1dd212dc9754c614809ff86bd0638fa
-- Downloading https://github.com/openssl/openssl/archive/openssl-3.1.4.tar.gz -> openssl-openssl-openssl-3.1.4.tar.gz...
-- Extracting source /home/edd/git/vcpkg/downloads/openssl-openssl-openssl-3.1.4.tar.gz
-- Applying patch disable-apps.patch
-- Applying patch disable-install-docs.patch
-- Applying patch script-prefix.patch
-- Applying patch windows/install-layout.patch
-- Applying patch windows/install-pdbs.patch
-- Applying patch unix/android-cc.patch
-- Applying patch unix/move-openssldir.patch
-- Applying patch unix/no-empty-dirs.patch
-- Applying patch unix/no-static-libs-for-shared.patch
-- Using source at /home/edd/git/vcpkg/buildtrees/openssl/src/nssl-3.1.4-c5488d00d9.clean
openssl requires Linux kernel headers from the system package manager.
   They can be installed on Alpine systems via `apk add linux-headers`.
   They can be installed on Ubuntu systems via `apt install linux-libc-dev`.

-- Getting CMake variables for x64-linux

I (of course) have linux-libc-dev installed here. Is this 'merely' vcpkg talking to me telling that there are things it cannot get (and where it doesn't need to talk to me because I ... already have them?

[teo-tsirpanis]

I saw this too, vcpkg always prints it. https://github.com/microsoft/vcpkg/blob/1de2026f28ead93ff1773e6e680387643e914ea1/ports/openssl/unix/portfile.cmake#L1-L7