coin: Bump the vcpkg OpenSSL override to 3.5.4

The manifest has pinned openssl to 3.0.7 port-version 2 since a5a63931
(Nov 2023), which was the version manual provisioning shipped at the
time. Support for the OpenSSL 3.0 line ended on 2026-09-07, and manual
provisioning has since moved to 3.5.4.

qtgrpc is the only module that opts into vcpkg today, and it does link
the vcpkg copy: the qtgrpc_standalone_tests configure reports OpenSSL
3.0.7 out of installed/<triplet> on Linux, Windows and macOS, and
grpc_testserver, tst_grpc_client_end2end and
tst_grpc_client_interceptors link it. So the stale pin is live, not
dormant.

Pin 3.5.4 port-version 0 rather than dropping the override: it matches
install-openssl.sh and openssl.ps1 exactly, and 3.5 is an LTS release
whereas the registry baseline 3.6.3 is not. The port exists at the
registry tag we already pin, so vcpkg_version.txt stays untouched.

Request the "tools" feature at the same time. 3.0.7 installed the
openssl executable unconditionally; 3.5.4 puts it behind that feature,
which is not enabled by default. qtgrpc's test_server does
find_program(openssl) to regenerate its TLS test certificates and only
warns when the executable is missing, leaving the TLS tests to fail
later on absent key.pem and cert.pem. Building the tool alongside the
libraries keeps the CLI and the linked library at the same version and
drops a hidden dependency on manually provisioned OpenSSL being on
PATH, which is what we want to retire.

The feature is scoped to non-Android, because vcpkg puts the target
triplet's tools directory on CMAKE_PROGRAM_PATH. A cross-built openssl
there would be picked up by find_program and fail to run on the host,
which is the same trap as QTBUG-145933 for protoc. Android keeps the
plain port; the certificates are generated by the host tool anyway.

Task-number: QTBUG-115715
Change-Id: I3b36677837fae3080e9362526bd35012e31fc04e
Reviewed-by: Alexandru Croitor <[email protected]>
(cherry picked from commit f1632a6b40)
Reviewed-by: Qt Cherry-pick Bot <[email protected]>

coin/provisioning/common/shared/vcpkg/vcpkg.json

@@ -2,14 +2,19 @@
   "overrides": [
     {
       "name": "openssl",
-      "version": "3.0.7",
-      "port-version": 2
+      "version": "3.5.4",
+      "port-version": 0
     }
   ],
   "dependencies": [
     {
       "name": "openssl",
-      "platform": "!ohos"
+      "platform": "!ohos & !android",
+      "features": [ "tools" ]
+    },
+    {
+      "name": "openssl",
+      "platform": "android"
     },
     {
       "name": "protobuf",