optee-test: Use openssl embedded in optee-test

optee-test: Use openssl embedded in optee-test

Building against openssl from Yocto results in a build break:

```
| /opt/work/upstream/fsl-xwayland/tmp/work/cortexa53-crypto-fsl-linux/optee-test/3.15.0.imx-r0/git/host/xtest/regression_8100.c:133:17: error: 'ERR_get_error_line' is deprecated: Since OpeSL 3.0 [-Werror=deprecated-declarations]
|   133 |                 e = ERR_get_error_line(&f, &l);
|       |                 ^
| In file included from /opt/work/upstream/fsl-xwayland/tmp/work/cortexa53-crypto-fsl-linux/optee-test/3.15.0.imx-r0/git/host/xtest/regression_8100.c:18:
| /opt/work/upstream/fsl-xwayland/tmp/work/cortexa53-crypto-fsl-linux/optee-test/3.15.0.imx-r0/recipe-sysroot/usr/include/openssl/err.h:411:15: note: declared here
|   411 | unsigned long ERR_get_error_line(const char **file, int *line);
|       |               ^~~~~~~~~~~~~~~~~~
```

Configure optee-test to build with its own openssl.

Signed-off-by: Tom Hochstein <tom.hochstein@nxp.com>