openssl: change source download location

openssl source code download is not working from openssl
website, the curl command used to download the source is
throwing below error,

curl: (22) The requested URL returned error: 404

so move to github release, also release 3.2.1 is not available
on github so use 3.2.2 which also works.

also delete OPENSSL_DIR before creating it, because mkdir
throws error if directory already exists which is the case
if openssl got the error during download/compilation and
setup.sh needs to be run again.

'mkdir -p' won't throw error but better to start from scratch
in case there is any error.

Signed-off-by: Jagdish Gediya <jagdish.gediya@arm.com>