Protect telemetry with BasicAuth

Wrap the /system/telemetry handler with the same BasicAuth middleware
as the other /system endpoints. This prevents unauthenticated access
to provider telemetry when basic_auth is enabled.

Credit to @geo-chan for flagging this - but next time follow the
disclosure process - which is not opening a public issue. See
SECURITY.md which points to CONTRIBUTING.md.

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alex@openfaas.com>

Update Go to 1.24 and vendor for CE gateway

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Remove armv7 from images

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alex@openfaas.com>

Allow CE gateway to proxy telemetry handler from OEM/Pro backend

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Update vendor

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Apply gofmt

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alex@openfaas.com>