Increase timeout for `parsec-simple-e2e-tests`

RSA 2048 key generation for Corstone-1000 platforms is very slow due to their limitations, therefore allowing more time to complete parsec tests.

Further, only run this test as part of nightly or weekly when scheduled for Corstone-1000 FVP as each MR would take up resources

Also set similar timeout for N1SDP as worst case scenario.

Signed-off-by: Vikas Katariya vikas.katariya@linaro.org